GOG G-1 Guide
G-1TM
Operation and adjustment instructions
GOGpaintball.com
QUICK START
01 02 03
Unpack the G-1TM and its stock. Using the included 1/8-inch allen
wrench, attach the stock to the rear of the G-1 with the two included
screws.
Install the included barrel
into the G-1TM, screwing it
into place hand tight. Put the
supplied barrel blocker over
the end of the barrel, securing
its cord as far back on the
G-1TM body as possible, and
cinching it tight.
Fill the loader with paintballs. If it is a powered loader, turn it on. While wearing ASTM compliant paintball goggles, in an area where all bystanders are protected, remove the barrel
blocker and re over a chronograph to measure the velocity. Using a 5/32-inch allen wrench on the adjuster in the bottom of the vertical regulator, turn clockwise to increase the
velocity/pressure, and counter-clockwise to decrease. Take three or four shots after every adjustment to allow the gas pressure inside the G-1TM to stabilize. Adjust until the marker
is ring consistently within the limits for the eld where you are playing (for safety reasons, never adjust the G-1TM to re at greater than 300 feet per second). Depending on what
modes of re are allowed at the eld where you are playing (semi-automatic, rebound, etc.) you may need to adjust the G-1TM’s ring mode. See the Electronic Adjustment section
for more information.
Fit a paintball loader into the feedbeck
of the G-1TM. Use a 7/64-inch allen
wrench to lock the loader in place.
Powered force-feed loaders are
recommended, as the G-1 has little
recoil, and can easily outpace an
unpowered or agitating loader.
Gently gas up the G-1TM by
slowly turning on the air system
or screwing the CO2or screw-
in style HPA system into the
bottom-line ASA.
A gentle rise in pressure is
important, as a sudden blast
may reduce the service life of
the G-1®’s internal components.
Turn on the G-1TM by
pressing the power button
momentarily.
Although the power button
serves as the G-1TM’s safety
switch to prevent accidental
ring, it should never be relied
upon in place of a barrel blocker
and proper eye protection.
04 05 06
STOCK BARREL BLOCKER FILL TANK
LOADER TURN ON GAS TURN ON THE G-1TM
ADJUST VELOCITY
Have your compressed air
(HPA) or CO2 tank lled by
a person who is properly
trained to do so. If using an
HPA system with an on/off
valve, make sure it is in the
OFF position. If using a CO2
tank or screw-in style preset
HPA system, ll it while it is
removed from the marker.
07
00
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Quick Start
Table of Contents and Safety Warnings
Getting Familiar
Barrel Blocker / Hopper
Gasses
Battery
Paint
Trigger Adjustment
Flashlight Mounting
Firing Modes / Dwell
Unloading / De-Gassing
Field Stripping
Advanced Maintenance
Feedneck Position
Vertical Regulator
Troubleshooting / Warranty
Parts Diagrams
00
01
02
03
04
06
07
08
09
10
11
12
13
14
16
18
21
• THE G-1TM IS NOT A TOY.
• MISUSE OF THE G-1TM MAY RESULT IN SERIOUS
INJURY OR DEATH.
• EYE PROTECTION DESIGNED FOR PAINTBALL USE
MUST BE WORN BY THE USER AND ANY PERSON
WITHIN RANGE OF THE G-1TM.
• GOG PAINTBALL® RECOMMENDS THAT
THE G-1TM ONLY BE SOLD TO PERSONS 18 AND
OLDER.
• THOROUGHLY READ THE G-1TM OPERATION AND
INSTRUCTION MANUAL BEFORE OPERATING.
• TREAT EVERY PAINTBALL MARKER AS IF IT WERE
LOADED.
• NEVER LOOK DOWN THE BARREL OF A PAINTBALL
MARKER.
• KEEP YOUR FINGER OFF THE TRIGGER UNTIL
READY TO SHOOT. NEVER POINT THE G-1TM AT
ANYTHING YOU DON’T INTEND TO SHOOT.
• KEEP THE G-1TM ON SAFE (POWER OFF) UNTIL
READY TO SHOOT (SEE QUICK START).
• KEEP THE BARREL BLOCKING DEVICE ON THE
G-1TM’S MUZZLE WHEN NOT SHOOTING (SEE
BARREL BLOCKER SECTION).
• ALWAYS REMOVE PAINTBALLS AND DE-GAS THE
G-1TM BEFORE DISASSEMBLY (SEE DEGASSING
SECTION).
• STORE AND TRANSPORT THE G-1TM UNLOADED
AND DEGASSED IN A SECURE PLACE.
• FOLLOW ALL MANUFACTURER’S WARNINGS
AND INSTRUCTIONS FOR PROPELLANT SOURCE
HANDLING, STORAGE AND FILLING.
• DO NOT SHOOT FRAGILE OBJECTS SUCH AS
WINDOWS.
• ALWAYS MEASURE THE VELOCITY OF PAINTBALLS
FIRED BY THE G-1TM BEFORE USE, AND NEVER
ADJUST TO FIRE ABOVE 300FPS (91.44M/S).
TABLE OF CONTENTS
01
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The G-1TM has been designed with simplicity
in mind so that you can concentrate on your
game instead of your marker. It has only one
major moving part in its valve system, with
a minimal number of seals. This DOES NOT
mean that you should neglect your G-1TM. If
you take care of it off the eld, your G-1TM
will take care of you on the eld. For best
performance, clean and grease your G-1TM
frequently. Many players disassemble and
clean their G-1TM after every day of use.
While this may seem a bit extreme, being
vigilant in the upkeep of your G-1TM will
extend its useful life considerably, and
catch any problems when there is time to
correct them before the next game. Playing
in the rain will not damage your G-1TM. In
fact, the G-1TM. has been tested and proven
to function underwater. However, long-
term exposure to moisture can cause rust
damage to some of the G-1TM’s screws, so
if your G-1TM should become waterlogged,
remove the barrel, stock and rubber grips
and allow it to dry out, then follow the
disassembly instructions for full cleaning.
Clean out mud and paint with a damp cloth
and alcohol. Lubricate the G-1TM ONLY with
GR33SETM pneumatic grease. Use fresh,
high quality paintballs for best performance.
REQUIRED ITEMS FOR MAINTENANCE
STATISTICS MAINTENANCE
WEIGHT:
OPERATING PRESSURE:
POWER SOURCE:
PROPELLANT:
RATE OF FIRE:
OPERATION:
MODES OF FIRE:
ANTI CHOP SYSTEM:
BARREL THREAD:
LUBRICANT:
2.7 lbs. (Not Incl. Stock)
160 psi
9-volt Alkaline Battery
CO2 or Nitrogen/Compressed air
11 bps
Low pressure electropneumatic
Semi-Automatic, Billy-BallTM, PSP and Select Fire
Low-Force bolt
GOG®
For proper and consistent operation, the G-1TM should only
be lubricated with GR33SETM lubricating grease.
GETTING FAMILIAR PLEASE READ CAREFULLY
02
REQUIRED ITEMS FOR USE
• 5/32-inch Allen Wrench (included) - Velocity Adjustment
• Chronograph (provided for use at commercial paintball
eld) - Velocity Adjustment
• Barrel Blocker (included)
• CO2 or HPA tank (purchase seperately)
• ASTM Compliant Paintball Goggles with Mask
(purchase seperately)
• 68 Caliber Paintballs
• Paintball Hopper/Loader (purchase seperately)
• 9-Volt Alkaline Battery
• 5/64-inch Allen Wrench (included) - Battery Change
• 7/64-inch Allen Wrench (included)- Clamping Feedneck
• 1/8-inch Allen Wrench (included) - Stock/Backplate,
Trigger Adjustment, ASA, Grip, Breech and Circuit
Board Screws
• 5/32-inch Allen Wrench (included) - Velocity Adjust-
ment
• 5/16-inch Allen Wrench (included) - Bolt Sleeve
• Snap-Ring Pliers (purchase seperately) - Regulator
Disassembly (Advanced Maintenance)
• GR33SE
TM
(purchase seperately) - Paintball Marker
Lubricant
GOGpaintball.com
FIG. 1
FIG. 2
BARREL BLOCKER IN USE
USE HIGH PERFORMANCE LOADER
The Barrel Blocking Device is a critical piece of paintball safety equipment - nearly as important as
paintball goggles. The Barrel Blocker serves to protect against accidental discharge of a paintball by
catching it before it can cause harm. A Barrel Blocker is included with the G-1TM and must be used every
time it is handled in an area where people or property are not properly protected by paintball goggles
or paintball eld netting. To use the Barrel Blocker simply slip it over the end of the barrel and stretch
its cord back over the back of the G-1TM or the rearmost part over which it can be securely looped. Use
the strap’s adjuster to cinch the strap tight, so that the Barrel Blocker can provide protection against
accidental discharge of a paintball.
The Barrel Blocker should only be removed when the G-1TM is on a “live” paintball eld and all persons
involved are wearing proper paintball protection.
The G-1TM is a high performance tournament grade paintball marker. Its low-force bolt will often
prevent paintballs from being chopped if the hopper is not able to load paintballs as fast as the G-1TM is
being red. If you want to realize the G-1TM’s maximum repower potential, especially if it is upgraded
with a circuit board that utilizes an anti-chop eye for higher rates of re, you will need to use a high
performance loader. High performance loaders, especially those which provide force-feeding, will yield
the best results with the G-1TM.
The G-1TM is equipped with a clamping feedneck that allows it to adapt to the small size differences
in hopper neck sizes, yet lock or release quickly. Using a 7/64-inch allen wrench, loosen the clamping
feedneck before installing a hopper. If the hopper is a tight t, a at bladed screwdriver may be used to
further spread the gap in the feedneck clamp, provided the clamp screw has been loosened enough.
The G-1TM may also be congured so that the hopper is located to the right, left, or directly above the
center of the marker. See the Advanced Maintenance Section of this manual for instructions to change
or reposition the feedneck.
BARREL BLOCKER
HOPPER
BARREL BLOCKER/HOPPER PLEASE READ CAREFULLY
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NEVER PUT OIL IN A COMPRESSED AIR REGULATOR OR
TANK - ONLY APPLY MANUFACTURER RECOMMENDED
LUBRICANTS.
GASES
The G-1TM is a low-pressure paintgun. It operates at approximately 160 psi, which means it is capable of
functioning well with either high-pressure compressed air or CO2as a power source. Proper set up of your
gas system will help you obtain the best possible performance from your G-1TM.
Whether using compressed air or CO2it is important that the G-1TM is not exposed to sudden “pops” of
pressure. Always turn-on or screw-in a compressed air system or CO2slowly, so that the valve opens
slowly, and the gas pressure inside the marker is raised smoothly. Be gentle to the internals of your G-1TM
and they will reward you with a long service life.
High Pressure Air systems (HPA) are the preferred power source used in paintball as they are unaffected
by temperature uctuations and do not have the potential for liquid problems. HPA systems consist of
a tank and a regulator, and are typically rated to store air or nitrogen at pressures of 3,000 or 4,500 psi.
Although pure nitrogen is almost never used in paintball, many players call compressed air “nitro” as air
is made up of more than 70% nitrogen, allowing the two gasses to be used interchangeably in paintball
equipment.
The G-1TM is congured for use with screw-in style HPA systems. Although HPA systems pre-set to deliver
approximatly 400 psi (low output) will work with the G-1TM, 800 psi (high output) systems are preferred, to
reduce the risk of gas starvation under rapid re.
Never use oil or any petroleum based cleaner or lubricant in a compressed air regulator or tank. Exposure to
pressurized air increases oil’s ammability and can cause a serious safety hazard. Only use manufacturer
recommended lubricants with compressed air systems, and follow the manufacturer’s maintenance and
operation instructions explicitly.
If you are using your G-1TM with an adjustable output compressed air system, it should be set to deliver
about 800 psi. The G-1TM’s vertical regulator can accommodate a wide range of input pressures, so exact
adjustment of the air system is not critical.
FIG. 3 HPA TANK BEING FILLED
GASES
NOTICE
Due to shipping restrictions, CO2 and HPA tanks are sold empty. They must be lled before they can be
used. Most paintball shops and elds are equipped to ll HPA tanks. Paintball shops, elds, many hardware
stores and sporting goods stores will have the equipment and trained personnel to ll paintball CO2tanks.
The G-1TM is factory congured for use with CO2. Its
dwell setting must be changed to obtain optimum
performance with HPA. See the Firing Modes /
Dwell section of this manual to learn how.
NOTICE
04
Although the G-1TM can be powered by
compressed air, typical home, garage or industrial
air compressors can not provide the high pressures
required to ll a paintball HPA tank. Paintball HPA
systems can be relled by paintball elds and
stores which use higher pressure compressors
similar to those used in the SCUBA and reghting
industries.
NOTICE
GOGpaintball.com
CO2is usually not recommended for electronic paintball markers. This is not the case, however with
the G-1TM. As long as it is set up properly, the G-1TM can function extremely well with CO2as a power
source. In fact, because of its extremely low operating pressure, the G-1TM has been shown to operate
on CO2 continuously under heavy re conditions where older design blowback mechanical markers
fail. The use of CO2will not damage the seals in the G-1TM, freeze or cause damage to its circuit board.
The important thing to remember if using CO2is that best performance can be achieved when only
gasseous CO2is fed to the G-1TM, and liquid CO2remains in the tank.
Although the relief valve integrated into the G-1TM’s vertical regulator provides the marker with protection
from pressure spikes, those pressure uctuations can cause poor performance, and temporary blockage
of the G-1TM’s solenoid valve.
The bottom-line ASA tting on the G-1TM places the CO2tank at an angle. When the marker is held
in typical ring positions, gravity will keep the liquid CO2away from the tank valve, preventing it from
feeding into the marker.
Alternative CO2arrangements include placing the CO2tank vertically in a pack, and using a paintball
CO2remote hose to feed CO2to the G-1TM. This arrangement not only prevents liquid CO2 from entering
the marker, but also makes the marker assembly lighter weight.
Anti-siphon CO2 tanks contain a J-shaped tube that draws gaseous CO2from the top of the tank
when it is in a horizontal position. Anti-siphon tubes must be professionally installed, to ensure that
critical safety checks are performed during valve installation. If using an anti-siphon tank, the G-1TM’s
stock bottom-line ASA tting should be replaced with an ASA that will place the tank completely hori-
zontal. Anti-siphon CO2tanks should not be used with remote hoses.
The bottom-line ASA tting on the G-1TM can be removed by unscrewing the two industry-standard
10-32 mount screws holding it to the grip frame. If replacing the ASA, be sure the model chosen
takes into account the type of gas system being used (horizontal for anti-siphon CO2tanks, angled for
standard tanks).
GASES PLEASE READ CAREFULLY
FIG. 4
FIG. 5
ANGLED CO2[CUTAWAY VIEW]
CO2 WITH ANTI-SIPHON [CUTAWAY VIEW]
CO2 may also be congured with a remote
hose with-out Anti-Siphon. [Not Shown]
IMPORTANT
USING CO2
BOTTOM-LINE ASA
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OVER TIME BATTERIES MAY LEAK. ALWAYS REMOVE THE
BATTERY FROM THE G-1TM WHEN STORING FOR FOR MORE
THAN A MONTH.
BATTERY
The G-1TM is powered by a standard 9-volt alkaline battery. Lower cost “heavy duty” batteries will not
consistently deliver the amperage needed to operate the G-1TM. Erratic performance, especially drops in
velocity or skipped shots during rapid re can result from a battery that is not delivering full power.
The G-1TM is also compatible with 9-volt rechargeable batteries. Because specications of batteries vary
widely from brand to brand, use of any rechargeable battery will require testing to determine if it can
power the G-1TM reliably. Some NiCD “9v” rechargable batteries actually operate at 7.2 volts. These types
of batteries will not work well with the G-1TM.
Any time the G-1TM exhibits erratic performance, drops velocity or skips shots while rapid ring, does not
shoot or does not turn on, the rst step in troubleshooting should always be to replace the battery with a
brand-new, name-brand alkaline battery.
To replace the G-1TM battery, use a 5/64-inch allen wrench to remove the two screws from the left side
of the rubber grip, then open the grip. Remove the old battery, taking care not to bend, kink or strain its
wires. Unsnap the battery from its connector by pulling on the connector, not the wires. Snap in a fresh
battery, then place that in the grip frame, tucking the wires into place, before closing and re-securing the
grip.
FIG. 6
BATTERY
ALKALINE BATTERY
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Even the best quality paintballs will vary in size from one batch to the next and as weather conditions
change. While your G-1TM will work well even with a poor paint to barrel t, optimal performance will
be achieved with a proper t.
The ideal t between the paintball and the barrel is when the ball is inserted in the bore (the end that
screws into the G-1TM) and does not slip or roll through to the muzzle (the business end) on its own.
The ball should sit in place, even when the barrel is pointed straight down. If the paintball can roll out
on its own, the t is too loose. The ball should be able to be expelled from the barrel by blowing it out,
like a blowgun, using a minimal amount of breath. If the ball is difcult to blow through, the t is too
tight, which can lead to ball breakage.
The velocity, or speed at which a paintball is red from the G-1TM, must be measured and adjusted to
below the paintball eld’s velocity limit immediately before each day of play (for player safety). If CO2
is used, velocity should be checked and adjusted multiple times during the day. In an area where it is
safe to re paintballs, while wearing ASTM compliant eye and face protection for paintball, re three or
four shots over a chronograph to measure the velocity at which the paint is being red.
If velocity adjustment is necessary, Use a 5/32-inch allen wrench on the adjuster in the bottom of the
vertical regulator, turn clockwise to increase the velocity/pressure, and counter-clockwise to decrease.
Take three or four shots after every adjustment to allow the gas pressure inside the G-1TM to stabilize.
Adjust until the marker is ring consistently within the limits for the eld where you are playing. For
safety reasons, never adjust the G-1TM to re at greater than 300 feet per second (91.44 meters per
second).
VELOCITY ADJUSTMENT
FIG. 7
PAINT/VELOCITY
PAINT
VELOCITY
NEVER ADJUST THE G-1TM TO FIRE ABOVE 300
FEET PER SECOND, AS SERIOUS INJURY MAY
RESULT.
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The length of the G-1TM trigger pull is adjustable with a 1/8-inch allen wrench. The trigger adjustment
screw is located at the bottom of the trigger guard where it meets the grip frame. It may be helpful to
remove the marker’s rubber grips to provide easier access when making adjustments.
Turning this screw clockwise decreases how far forward the trigger can move, while turning
counterclockwise increases it. If the trigger is not adjusted to swing far enough forward, the
microswitch inside the G-1TM will not be able to reset, resulting in the marker not ring.
Always check the trigger after making adjustments. Be sure that the trigger switch clicks when the
trigger is pulled, and again when it is released. Also make sure that when the trigger is pulled it is
being stopped by the rear trigger limit screw, not by pressing up against the microswitch inside the
marker.
TRIGGER ADJUSTMENT
FIG. 8 TRIGGER ADJUSTMENT
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FIG. 9
FIG. 10
FLASHLIGHT PLUG
FLASHLIGHT INSTALLATION
In addition to accessories that can be mounted on its Picatiny tactical rails, the G-1TM features an
integrated ashlight mount. Using this mount, a compatible 2-Cell AA Mini Maglite® ashlight can be
used to perform the same night-game functions as a more expensive tactical ashlight.
Make sure the G-1TM is unloaded and use a 1/8-inch allen wrench to remove the two screws holding
the lower front tactical rail in place.
Lift the rail, exposing the stainless steel ashlight pin. Remove the pin with a 5/64-inch allen wrench,
then rotate the foregrip to expose the rear ashlight pin hole, or unmount the ASA (see air system
adapter section) and completely unscrew the vertical foregrip and regulator as shown.
The ashlight mount plug may then be wiggled out of its position and stored for later use.
Slide the ashlight into the ashlight mount, making sure that the lanyard attachment hole at its rear
is aligned with the rear ashlight pin hole.
Install the ashlight pin in the rear ashlight pin hole, then reinstall or rotate the foregrip back into
position, reinstall the ASA if it was removed, and reinstall the lower accessory rail.
FLASHLIGHT MOUNTING
Maglite® is a trademark of Mag Instruments, Inc., which is not
afliated with GOGPaintball, SA.
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Changing between ring modes is simple. Use a 5/64-inch allen wrench to open the left side grip panel.
Remove and unplug the battery, taking care to pull the battery clip away from the battery, rather than
pulling on the battery wires. Hold down the trigger while re-attaching the battery, and the marker’s
microprocessor will switch to a new mode, indicating the change by blinking the power LED. The number
of times the LED blinks will indicate the newly selected mode. Replace the battery in the grip frame,
carefully tucking in the wires, and re-secure the left side grip with a 5/64-inch allen wrench.
• Select Fire (Single Flash) - In this mode, the player can choose between semi-automatic (one shot per
trigger pull,) 3-round burst (3 shots in a row red while the trigger is pulled and held) or full-automatic
(res repeatedly when the trigger is pulled and held.) Tapping the power button while the marker is live
cycles through the ring modes, each indicated by the rate at which the power LED blinks.
• PSP (Double Flash) - The marker will re one shot per trigger pull until the trigger is pulled 3 or more
times rapidly in quick succession, at which point it will re additional shots per trigger pull up to a
maximum of 10 shots per second. If the trigger is inactive for a brief time, the marker will revert to the
beginning of the sequence, ring one shot per trigger pull, in accordance with PSP tournament rules
adopted in 2009.
• Locked Semi-Automatic (Triple Flash) - The marker will re one shot per trigger pull, and cannot
be changed without using tools to open the grip. This mode complies with tournaments, elds and
scenario games that limit players to semi-automatic mode only.
• Billy-Ball (Quadruple Flash) - This is a limited rate semi-automatic mode, ring one shot per trigger pull,
but only allowing players to re once every two seconds. Billy-Ball games games focus on movement
and strategy over heavy rate of re, reducing paint costs.
The G-1TM’s dwell setting determines how long it opens its solenoid valve to re a shot. Because CO2
expands differently than HPA, the optimal pulse length is different for each gas. The G-1TM is congured
from the factory to use CO2. If you intend to use HPA, you must change your dwell mode in order to
achieve best gas efciency and battery life. With the marker unloaded and de-gassed, remove and unplug
the 9-volt alkaline battery. Plug the battery back in while holding the power button down. The G-1TM will
indicate that it has changed to HPA mode by double-blinking the power button LED and turning off.
Reinstall the battery and grip panel. If you switch back to CO2as a power source, repeat the procedure,
and the CO2 dwell mode will be signied by a single blink pattern on the LED.
FIRING MODES / DWELL
CHANGING FIRING MODES
G-1TM MARKERS MANUFACTURED FOR THE
UNITED KINGDOM ARE LIMITED TO LOCKED
SEMI-AUTOMATIC AND BILLY-BALL MODES IN
ACCORDANCE WITH UK LAW.
FIG. 11 CHANGING MODES
DWELL
NOTICE
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At the end of each day’s use and before performing maintenance work on your G-1TM, it will need
to be de-gassed, and all paint removed.
In an area where it is safe to shoot (the chronograph area at a paintball eld) and while wearing
paintball goggles, remove the hopper from the G-1TM. By turning the G-1TM upside down, you can
empty any extra paintballs from the feedneck into your hand. Turn the G-1TM on.
Dry-re 2 or 3 shots in a safe direction to ensure that no paintballs remain in the G-1TM.
Continue to dry re the G-1TM in a safe direction while turning off or unscrewing the HPA system
or CO2tank, until all of the gas pressure inside has been released. At this point the only sound you
should hear when you pull the trigger is the click of the solenoid valve. Turn off the G-1TM.
If using a CO2tank or screw in HPA system, unscrew it the rest of the way.
EVEN WITH NO CO2 OR COMPRESSED
AIR SYSTEM ATTACHED, THE G-1TM MAY
STILL HAVE ENOUGH GAS PRESSURE
STORED IN THE REGULATOR AND
FIRE CHAMBER TO FIRE 2 OR MORE
SHOTS. YOU MUST DEGAS YOUR
G-1TM BEFORE PERFORMING ANY
MAINTENANCE PROCEDURES.
UNLOADING/DE-GASSING PLEASE READ CAREFULLY
ALWAYS WATCH COMPRESSED
GAS CYLINDERS TO MAKE SURE
THAT THE CYLINDER AND VALVE
ARE UNSCREWING FROM THE ASA,
AND THAT THE CYLINDER IS NOT
UNSCREWING FROM ITS VALVE. IF THE
CYLINDER DOES BEGIN TO SEPARATE
FROM ITS VALVE, STOP IMMEDIATELY,
AND SEEK PROFESSIONAL
ASSISTANCE.
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GOGpaintball.com
The valve system in the G-1TM has only one major moving part. Regular cleaning and lubrication is necessary to ensure accurate and consistent performance. The G-1TM should
be eld stripped, cleaned and lubricated any time it shows erratic performance, becomes contaminated with paint, dirt or other debris, or for general maintenance after 3 or 4
days of use.
Unload and de-gas the G-1TM. Use a 1/8-inch allen wrench to remove the two stock mounting screws and remove the stock. Remove the barrel and use a 5/16-inch allen wrench
to unscrew and remove the bolt sleeve from the back.
Using a soft, non-marring tool like a wooden chopstick or plastic toothbrush, push the bolt and bolt stop out the back of the G1TM. Clean the interior of the receiver, the bolt
sleeve, bolt and bolt stop with a clean cloth or paper towel. Inspect their o-rings for signs of damage such as cuts or rips, and replace if necessary. Lightly lubricate all o-rings
with GR33SETM paintgun grease. Use GR33SETM sparingly, as over-lubrication can cause the G-1TM to operate inconsistently. Slide the bolt stop onto the bolt from the rear. Slide
the rear of the bolt into the bolt sleeve. Hold this entire assembly vertically with the front of the bolt pointing upward, and insert it up into the back of the G-1TM. Screw the bolt
sleeve into the back of the G-1TM by hand, taking care not to cross-thread it into the receiver.
Use the long end of a 5/16-inch allen wrench to turn the bolt sleeve until it is snug. Reinstall the stock. As with the bolt sleeve, take care not to over-tighen these screws.
FIG. 12
FIELD STRIPPING CLEANING
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The internal gas lines and electronic components of the G-1TM are well protected inside its body – however they are delicate and may be damaged by improper handling or
re-installation. For this reason it is highly recommended that full disassembly of the G-1TM be performed by an airsmith with GOG PaintballTM factory training. Removal of
internal hoses from their barbed ttings will stretch them to the point that they cannot be re-used without causing leaks.
Occasionally a more thorough cleaning of the G-1TM receiver is necessary to clean paint or debris that has worked deep into the breech, or to replace worn ball detents. Both
are accessed through a complete disassembly of the receiver.
Unload and degas the G-1TM, then eld strip the valve system following the instructions in this manual. Remove the lower accessory rail as when installing a tactical ashlight.
Using a 1/8-inch allen wrench, remove the screws holding the ASA to the grip frame. Unscrew the vertical regulator from the receiver’s vertical ASA. Take care not to lose
the lter screen that is inside the vertical ASA.
Remove the rubber grip and battery, as when changing the battery. Use a 1/8-inch allen wrench to remove the front and rear grip frame screws. Carefully remove the
grip frame from the receiver. Be aware that the clear power button ts loosely into its position in the side of the grip frame. Be careful not to drop or lose it. Watch to make
sure the battery clip does not snag in the grip frame as the two parts are separated.
Reach the long end of a 1/8-inch allen wrench through the access hole in the top tactical rail, down into the head of the vertical ASA screw.
Unscrew the the two gas-through banjo bolts (indicated with arrows in Figure 15) using a 1/8-inch allen wrench. If the G-1TM has been upgraded with a circuit board featuring
an anti-chop eye, unplug the wiring harness from the circuit board or anti-chop board (pull by the connector, not the wires) and lift the pneumatic control assembly off of the
receiver.
FIG. 13 GRIP FRAME REMOVAL FIG.14 BREECH SCREW REMOVAL
ADVANVED MAINTENANCE NOTE: Unload and degas the G-1TM before any
cleaning or maintenance work.
FIG. 15 CIRCUIT BOARD REMOVAL
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Remove the body block screw and body block, then slide the breech out the back of the receiver.
Both rubber ball detents should extend into the breech and show no rips or tears. If they must be replaced, they may be pried out with an o-ring pick, and pressed into place
with a small allen wrench.
If the G-1TM has been upgraded with a circuit board featuring an anti-chop eye, holding the breech and receiver upside down will help the anti-chop circuit board remain
seated while the parts are being reassembled.
When re-attaching the pneumatic control assembly to the receiver, take extreme care not to cross thread the ttings. Use the long end of the allen wrench to tighten the gas
ttings and all screws, being careful to tighten them snug without over tightening.
Over-tightening or cross threading screws or ttings may result in permanent, nonrepairable damage to the breech.
Be sure to guide the battery clip down into the grip frame before re-joining the grip frame and receiver. Make sure the clear power button does not fall out of its place during
reassembly.
Carefully tuck in all wires and hoses while rejoining the grip frame to the receiver.
If the grip frame does not t snugly to the receiver, pull the grip frame back away and look for hoses, wire, or improperly placed parts blocking the t.
FIG. 16 BODY BLOCK REMOVAL FIG. 17 BALL DETENT REMOVAL
ADVANVED MAINTENANCE CONTINUED
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The G-1TM is congured at the factory with an angled feed neck so that the upper tactical rail and any
sights mounted on it have a clear view to the target. The angled feedneck and hopper can be congured
to sit either to the left or right of center. Additionally, a vertical feedneck is included with the marker,
allowing a centered hopper placement, and a straight feed path for the paintballs.
The optimal position for the hopper is a matter of player preference. Some right-handed players prefer
to have the hopper on the right, so it obstructs less of their view. Most paintball rule sets stipulate that a
paintball hitting and breaking on the player or anything they are carrying (including marker and hopper)
takes them out of the game. For this reason some right handed players prefer a hopper-left arrangement.
In this conguration the hopper is still protected by hard cover when the player leans out of a bunker or
around a tree to the right, making them a smaller target. For left-handed players the benets of these
two hopper positions are reversed. Vertical feednecks became popular when most hoppers still relied on
gravity, and their unobstructed vertical feed path provided more consistent feeding of painbtballs. Center
placement of the hopper also keeps the marker balanced and is a good compromise of exposed target
area for players who pop out to both the left and right side of cover.
To change the side from which the G-1TM feeds, the marker must be disassembled and the breech
removed from the receiver, following the directions for advanced maintenance. The breech acts as a
locking mechanism securing the feedneck into the receiver. Once the breech is removed, the feedneck
may be slid out of the receiver to one side, reversed and slid back into place or replaced with the vertical
feedneck. The t of the feedneck to the receiver is quite snug, so it may need to be wiggled slowly and
carefully in and out of place. The marker may then be reassembled, making sure the feedneck is properly
centered, allowing the breech to slide into the receiver.
FEEDNECK POSITION
CHANGING HOPPER POSITION FIG.18 FEEDNECK REMOVAL
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Although explained here, regulator service should only be performed by a GOG PaintballTM trained airsmith.
With the marker unloaded and de-gassed, remove the lower tactical rail as when installing a ashlight
(see ashlight section of this manual). Unscrew the regulator from the marker and remove the grip frame
following the instructions in this manual. Take care not to lose the lter screen that sits inside the vertical
regulator’s ASA connection. Locate the regulator cover lock screw at the bottom rear of the regulator
cover and loosen it with a 3/32-inch allen wrench, then slide the regulator out of its cover.
Using a pair of snap-ring pliers, remove the snap-ring from the bottom of the regulator and slide the
regulator off the swivel. This is the preferred way to separate the regulator from the hose and bottomline
ASA because it does not disturb the sealed hose ttings and is not likely to cause a leak.
Using a 7/16 open end or adjustable wrench, engange the wrench ats in the sides of the spring platform
and remove it from the bottom of the regulator body. The regulator spring will now be free to fall out into
your hand. The brass regulator piston may be removed by tapping the regulator body against a table top
or solid, but soft surface such as a block of wood.
At this level of disassembly, the seal in the end of the piston and the regulator body may be inspected,
cleaned with a soft cloth or cotton swab, and replaced if necessary. If the regulator seal shows signs of
damage, it may be removed and ipped over so that its back side is used instead. If both sides of the seal
are damaged, it must be replaced. Lightly lubricate all o-rings with GR33SETM for reassembly.
Do not lubricate the regulator seal at the end of the piston.
VERTICAL REGULATOR
REGULATOR SERVICE FIG. 19 REGULATOR DISASSEMBLY
SERVICE AND ADJUSTMENT TO THE REGULATOR WILL
CAUSE CHANGES IN VELOCITY. ALWAYS RE-CHRONOGRAPH
THE MARKER FOLLOWING THE PROCEDURE IN THIS MANUAL
AFTER WORKING WITH THE REGULATOR.
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The relief valve assembly should only be removed if it is constantly leaking. Occasional venting, especially
if using CO2, is normal and does not indicate a leak. The relief valve assembly may be removed with a
9/64-inch allen wrench.
The velocity adjuster is located inside the lower end of the spring platform and similarly should only be
removed if shown to be the source of a leak or clog. First the internal c-clip ring must be removed from
inside the spring platform. This must be done with a pair of narrow snap-ring pliers. Some airsmiths have
used bench grinders to re-shape standard snap-ring pliers for this task. The adjuster is equipped with
left-hand threads and will need to be turned clockwise for removal. If regulator blockage is suspected, be
sure to inspect, and if necessary, replace the inlet lter in the side of the velocity adjuster.
The vertical regulator is reassembled in the reverse order of disassembly. The piston slides into the
regulator body wide end rst, followed by the regulator spring. The spring platform should be tightened
for a snug t. Do not over-tighten. Re-attach the regulator swivel to the bottom end of the regulator and
secure it in place with its snap-ring. Reinstall the assembled regulator into the marker. Re-adjust velocity
after servicing the regulator.
VERTICAL REGULATOR
REGULATOR SERVICE, CONTINUED
[ CONTINUED ]
NOTICE
THE RELIEF VALVE IN THE VERTICAL
REGULATOR PROVIDES PROTECTION
AGAINST PRESSURE SPIKES CAUSED
BY SEAL FAILURE OR LIQUID CO2.
REPLACING THE VERTICAL REGULATOR
WITH ANY OTHER BRAND OR MODEL
WILL BY-PASS AN IMPORTANT SAFETY
FEATURE CREATING A RISK OF
EQUIPMENT FAILURE OR INJURY AND
INVALIDATING THE GOG PAINTBALLTM
WARRANTY.
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MARKER IS LEAKING INTERNALLY
• Liquid CO2may cause temporary venting from relief valve or solenoid valve. This is
normal, and does not require repair. If CO2is venting frequently, make sure the marker
is properly congured to prevent feeding of liquid CO2.
• Pneumatic hoses may be loose, damaged or not fully connected. Replace hoses with
genuine GOG PaintballTM hoses only.
• Hose has been disconnected and re-attached. Replace with a new GOG PaintballTM
internal hose. Removing a hose streches it so that it cannot be re-used without leaking.
MARKER IS LEAKING DOWN THE BARREL
• One or more of the bolt or bolt stop o-rings are damaged or dirty. Inspect and replace
if necessary, making sure to clean and lubricate the parts following the instructions in
this manual.
MARKER IS LEAKING FROM BOTTOMLINE ASA
• Unload and de-gas the marker. Inspect the CO2or HPA tank o-ring. Clean, lightly
lubricate with GR33SETM and if necessary replace.
MARKER IS OCCASIONALLY LEAKING FROM THE VERTICAL REGULATOR
• Gas may occasionally vent near the top of the vertical regulator, especially when
using CO2. This is a normal function of the relief valve protecting the marker, and does
not indicate a problem. If CO2is venting frequently, make sure the marker is properly
congured to prevent feeding of liquid CO2.
TROUBLESHOOTING IMPORTANT
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