Indian Creek Design BushMaster Series User manual

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INSTRUCTION MANUAL
Version 1.2
Indian Creek Design BushMaster series
Model BKO
Copyright 1992…. 2003
All Rights Reserved
No part of this document may be copied or reproduced in any form or by
any means without the prior written consent of Indian Creek Design, Inc.
Trademark Notices:
* Panther VTS is a registered trademark of Indian Creek Design, Inc.
* Panther II VTS is a trademark of Indian Creek Design, Inc.
* Puma is a trademark of Indian Creek Design, Inc.
* Bobcat is a trademark of Indian Creek Design, Inc.
* Thunder CAT is a trademark of Indian Creek Design, Inc.
*Desert FOX is a trademark of Indian Creek Design, Inc.
* 45/68 Magnum VTS is a trademark of Indian Creek Design, Inc.
* BushMaster 2000 is a trademark of Indian Creek Design, Inc.
* BKO is a trademark of Indian Creek Design, Inc.
* BKO2 is a trademark of Indian Creek Design, Inc.
* BKO is a trademark of Indian Creek Design, Inc.
Notice is hereby given that this manual is part of the article owned inwhole by
Indian Creek Design, Inc., known as indicated in this manual and drawings.
All rights of manufacture and reproductionof sucharticlesorany part thereof
are reserved by Indian Creek Design, Inc. Neither said article nor any part
thereof may be manufactured or reproduced except by written authorization
from Indian Creek Design, Inc. All proprietaryrightsandinformation are the
sole property of Indian Creek Design, Inc.
STATEMENT OF LIABILITY
Indian Creek Design, Inc., delivers this air gun with the
understanding that Indian Creek Design, Inc., assumes no
responsibility for its resale or safe handling. It can be considered a
dangerous weapon if mishandled, abused, or the safety instructions
are ignored. Indian Creek Design, Inc., assumes no responsibility
for physical injury or property damage resulting from its use.
IndianCreekDesign, Inc.,makes no warranties with respect to this
documentation and disclaims any implied warranties of
merchantability or fitness for a particular purpose. The information
in this document is subject to change without notice. Indian Creek
Design, Inc., assumes no responsibility for any errors that may
appear in this document.
WARNING:
This is not a toy. Misuse may cause serious injury or
death. Eye protection designed for paintball use must
be worn by the user and any person within range. It is
to be used by adults only. It is to be used on safety
certified fields only. Obey all local, state and federal
laws. Follow the rules of safe paintball gun handling.
Read all instructions before use.

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BKO OVERVIEW
The BKO is a quality marking instrument specially designed to meet the needs of
the professional style tournament player. The BKO is an electronic solenoid
actuated computer controlled marking device. The major components of the BKO
are machined from solid, aircraft-grade aluminum, and then hard anodized per
military specifications. No castings are used in the construction of the BKO,
thereby providing the end user with a high-quality, precision-engineered marking
instrument.
Paintball markers get a lot of abuse. Indian Creek Design, Inc., has built the BKO
with this in mind. All internal parts, wear and contact surfaces have been heat
treated or hard anodized. The toughest and most resilient materials and components
have been used in the design of this instrument.
The BKO uses a single standard 9-volt battery for operation. The circuitry is a
microprocessor based digital controller.
The BKO does not need tools in order to field-strip it. Removing the field-strip
link-pin of the bolt enables the removal of the entire bolt assembly.
The BKO offers low-pressure operation. The main operating pressure is 200-300
PSI nominally adjusted to visually via the gauge on the primary (input) regulator.
The secondary pressure is factory pre-set and regulated to 85-95 PSI. Gas usage is
controlled through these 2 internal regulators. The unique feature of this gunis the
regulator adjustment. This allows precise adjustment forthe velocity controlof the
gun and for gas efficiency.
The BKO comes with a removable barrel system. This feature allows the user to
select a barrel that is most suitable for the playing conditions. All barrels are
mirror-honed with a step-bore and porting and stock length is 11".
OPERATION
Read the entire manual before you prepare your BKO for firing. Safety and safe
gun handling are the most important aspects of paintball sports. Please practice
each of the following steps with an unloadedgun before attempting to charge your
gun with compressed air and paint pellets. Do not load compressed air andpaint
pellets into your BKO until you feel completely confident with your ability to
handle your BKO safely.
Keep your finger out of the trigger guard and away from the trigger; point the
muzzle of the gun in a safe direction at all times. Keep the gun turned off until
ready to operate. The BKO does not have a mechanical safety, only an on-off
switch! Always keep your BKO pointed in a safe direction. Always use a barrel
plug.
Installing the 9 volt Power Source
The BKO requires a single 9-volt battery asthe electronic power source. The use of
long life batteries is recommended.
The 9-volt battery is located inside the 45 grip frame beneath the left side panel.
The battery is accessed through the two screwsthat hold the left side panel in place.
Remove the 2 screws that hold left side panel in place. Connect the battery to the
terminal and place the battery inside the grip frame carefully, being sure that the
black and red wires to the terminal are not stressed. Make sure that there are no
abrupt kinks and the wires are comfortably placed, do not force them into place.
Replace the side panel and 2 screws.

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CO2, Nitrogen or Compressed Air Usage
The BKO comes with a male quick-disconnect adapter on the bottom of the
regulator. The BKO can be set up to use a nitrogen or compressed air system.
Although it may be used, CO2 is not recommended for use as the propellant.
Generally the CO2 that we use as an industry is industrial grade CO2. It is dirty,
pumped fromlarge tanks full of contaminates including rust and metal flakes. CO2
can be used successfully if used with anti-siphon systems and filters. Be aware that
under the conditions of CO2 the results may not be as expected. Consult the place
where you purchased your BKO, or a recognized and competent airsmith, for
instruction in the safe handling of compressed-air cylinders before purchasing or
connecting one to your BKO.
Adjustable regulator compressed air systems:
The input pressure from your compressed air system should be regulated down to
350-500 PSI output pressure. Note: on MOST systems, there is a large difference
between the setting pressure and the actual output operating pressure. If your
compressed air system does not have an output pressure gauge on its regulator we
do not recommend its use.
Fixed output regulated compressed air systems:
Fixed output regulated tanks (preset) will work just fine with the BKO, however it
will not perform as well as an adjustable regulated tank. VERIFY the output
pressure from the regulator. If your compressed air system does not have anoutput
pressure gauge on its regulator we do not recommend its use.
CO2 usage:
Although it may be used, CO2 is not recommended for use as the propellant.
Generally the CO2 that we use as an industry is industrial grade CO2. It is dirty,
pumped from large tanks full of contaminates including rust, metal flakes and dirt.
CO2 can be used successfully if used with anti-siphon systems and filters. Be
aware that under the conditions of CO2 the results may not be as expected.
REMEMBER: CO2, compressed air or nitrogen systems can be extremely
dangerous if misused or improperly handled. Use only D.O.T. certified tanks.
Before pressurizing your BKO, check to make sure that you have a barrel plug or
barrel sock in place and there is no paint in the gun. The on-off switch should be
OFF. Air can now be applied, the gun will become pressurized and the gauge on
the regulator system adapter will show the air pressure regulated thru the input
regulator.
Paintball and Loader Usage
The BKO comes equipped to accept 1.03" OD standard-gravity feed loaders. Fit
the loader directly into the vertical feed tube. Always twist it down in a
CLOCKWISE direction. Always twist it off in a CLOCKWISE direction as well.
The BKO uses .68 caliber, water-soluble paint pellets. The pellets are gravity fed
from the loader through the direct vertical feed nipple and into the breech of the
gun.
Firing the BKO
Keep your finger out of the trigger guard and away from the trigger; point the
muzzle of your gun in a safe direction at all times during this process. Be sure your
goggles are securely in place. Push the on-off switch into the off position.
Always keep your BKO pointed in a safe direction!
1. Place the empty loader onto the gun. Be sure that it is securely mounted in
place.
2. Apply the compressed gas, pressurizing the gun.
3. Put the paintballs into the loader.
4. Remove the barrel plug.
5. Aim the gun at the target.
6. Push the on-off switch to the ON position, the LED will light up.
7. Place your finger on the trigger.
8. Pull the trigger with a smooth squeezing motion. BANG. . . .
UNLOADING THE BKO
Keep your finger out of the trigger guard and away from the trigger; point the
muzzle of your gun in a safe direction during this entire process. Alwayskeepyour
BKO pointed in a safe direction!
1. Push the on-off switch to the off position. The LED will be off.
2. Remove the pressurized gas from the marker carefully.
3. Place the barrel plug into the end of the barrel.
4. Tilt the marker so that the loader is lower than the body of the gun.
5. Remove the paintball loader from the directvertical-feed tube,turningthe
loader in a clockwise direction.
6. Inspect the inside of the direct vertical-feed tube to be sure that aball does

not remain inside the breech.
MAINTENANCE
CAUTION: Before attempting to perform any maintenance operations or any gun
disassembly, make sure that all paint pellets and sources of air propellants have
been removed fromthe gun. Insert a barrel plug, push the on-off switch to the OFF
position and keep the gun in its "SAFE" mode.
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Simple Maintenance
Keep your BKO clean and lubricated to eliminate the friction that would prevent
reliable operation. Clean and lube the gun before each use, and do not put it away
dirty. USE NO OILS! Do not use petroleum-based lubricants in the
lubrication of this gun. Do not use oils “made for paintball guns”. Do not use oils
“made for pneumatic tools”. Teflon or silicon spray lubricants are the
recommended types of lubrication for the bolt area of the main housing. Lithium
grease is recommended for lubricating the regulator pistons and the cylinder
assembly. Be sure it is Lithium Grease not axel grease.
Cleaning Paint from the Barrel
Unscrew the barrel with approximately one and one half (1-1/2) revolutions to
remove the barrel for swabbing/cleaning. Keep the barrel clean to insure the
continued accuracy of the BKO. Gelatin from the paintballs has a tendency to build
up in the barrel. As part of your cleaning ritual, wash out the barrel with hot soapy
water and rinse it well.
Removing the Bolt Assembly (Field Stripping)
Remove the paint and pressurized gas fromthe gun. The gun can be field stripped
while it is pressurized.
1. Remove (pull) the knurled pin from the top of the marker. Pull the bolt body
out the back of the main body.
Once the bolt assembly is removed, it is possible to clean the entire upper receiver
of the gun, including the breech and feed tubearea. You may slightly lubricate the
rear section of the bolt and bolt chamber with a light synthetic spray lubricant
before re-installing the bolt. Do not use petroleum/oil-based lubricants; do use
Teflon or silicon-based lubricants. The bolt is NOT a simple plastic; it is a natural
Delrin acetate material, which is a Dupont 3M material, developedspecifically for
this type of application. The use of a metal type of bolt will void all warranties.
1. Point the barrel downward and slide the bolt in until the linkpin hole lines
up with the slot in the hammer and carefully install the link pin.
Note: You must be sure that the link pin is engaged PROPERLY with the
hammer, if the link pin IS NOT PROPERLY replaced, you may damage the
hammer/cylinder assembly.

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Remember…operator error is not covered by warranty!
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STORAGE AND TRANSPORTATION
- Your BKO must be clear of all paint and propellant when not being used.
- Be sure the on-off switch is off and the LED is not lighted.
- Put the barrel plug in place.
- Make sure the gun is clean.
- Store your BKO in a clean, cool, dry place.
- Keep your BKO away from children.
This air gun is not a toy! To be used by adults only, or persons over 18 years of
age!
Your BKO must be clear of all paint and any source of propellant during
transportation to and from the playing field. Keep your barrel plug in place. Keep
the on-off switch in the off position. Protect your BKO from excessive heatduring
transportation. Observe and obey all local, state and federal laws concerning the
transportation of paintball guns. For information concerning any of the laws in
your area, contact your nearby friendly law enforcement agency.
IMPORTANT: Never carry your BKO uncased when not on a playing field. The
non-playing public and law enforcement personnel may not be able to distinguish
between a paint marking device and firearm. For your own safety and to protect the
image of the sport, always carry your BKO in a suitable gun case or in the box in
which it was shipped.
If you must ship your BKO for any reason, the box in which you purchasedthe gun
is acceptable to all major carriers. Never ship charged CO2 or pressurized gas
containers.
ADJUSTING THE TRIGGER PULL
You will notice two screws in your trigger. These screws adjust the length of
pull and actuation point of the trigger. The bottom screw adjusts your trigger
stop point (length of pull). The top screw is the contact point for your micro
switch.
1. Use blue loctite while adjusting the screws. Normal activity can cause
the screws to back out of adjustment. DO NOT glob the loctite on, it
can cause damage to the micro switch if you use too much.

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2. Begin by adjusting the bottom screw to your desired pull. Screw it in
to lessen the distance the trigger must travel.
3. Very Carefully screw in the top screw. Making large adjustments can
force the screw into the micro switch and damage it. You will want to
screw it in to the point where it makes contact with the micro switch
but does not permanently rest on it. Continually check to verify that
the LED flashes off and then back on when you pull the trigger. If you
pull the trigger and the LED goes off and stays off, you have adjusted
the screw in too far. Back it out.
4. Clean up any excess loctite and let it dry for at least an hour before
using your BKO. This ensures the screws will remain in place.
BKO TUNING GUIDE
Main Input pressure regulator adjustment:
The BKO operates on a proven and innovative system. Take the time to understand
this section. The pressurized gas is regulated internally. The pressure regulator is
externally adjustable via the screw in the side of the high-pressure regulator. A
3/32 allen key for this screw has been provided to access to this screw. To increase
the pressure apply the wrench into the screw and turn clockwise.
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NOTE: Only slight turns are needed to accomplish changes in thepressure usedto
shoot the paintball, thus changes in the velocity at which it is propelled.
To decrease the pressure registered on the gauge, turn the screw counter-clockwise.
You must take a clearing shot before the change in the decreasing direction can be
registered.
A pressure gauge has been installed into the regulator body to indicate the exact
operating pressure of the marker. This gauge is extremely useful. At the factory
we set the regulator gauge to 200-250 PSI with an input pressure of 400 PSI using
Compressed air as the base propellant. Under normal circumstances these settings
will produce paintball velocities at approximately 280-300 fps.
• If you have an adjustable tank regulator, the input pressure from your tank
should be set at 350-500 PSI. Higher input pressures will not provide
increased performance.
• If you have a fixed output regulator on your tank (pre-set) then you may
have to re-adjust the pressure shown on the gauge using the method
discussed previously.
• If you plan to use CO2, then please use an anti-siphon tank and a filter.
Low pressure regulator adjustment:
The low pressure regulator is your main source for paintball velocity
adjustments.
The low pressure regulator is the small cylindrical body that located directly behind
the high pressure regulator and directly in front of the grip. The low pressure
regulator is externally adjustable via the adjustment screw in the bottom of the
regulator using the same 3/32 allen wrench used to adjust the high pressure
regulator. The low pressure regulator is pre-set at the factory to 85-95 PSI to
operate the single 3-way solenoid actuated valve. It may be necessary to re-adjust
the low pressure regulator from time to time to accomplish the velocities that you
require. Bench adjusting the regulator can be done by pressurizing the gun, be sure
the input regulator is set properly, and then turning the adjustment screw inward
(clock-wise) until you hear a leak coming from the 3-way valve in the grip area.
The 3-way valve has an over-pressurization reliefvalve that will start to bleed off at
approximately 125 PSI, once you hear the leak start then back off the adjustment

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screw one half turn and the leak will stop. That will approximate the pressure to
about 90 PSI. The low pressure regulator isdesignedto shutdown andpreservethe
integrity of the low pressure system if it sees an input pressure over approximately
400 PSI coming from the main input regulator.
This gun was designed with safety and safety standards in mind. If you attempt to
shoot paintballs higher than established safety standards, the gun will not function
properly.
NOTE 1. You may notice that if you attempt to operate the gun at
extremely high velocities, the internals will not function properly!
NOTE 2. This gun is not designed to shoot above the safety limits
established by industry standards.
Just a side note:
Higher pressures do not equate into better performance and higher velocities.
High pressures in this marker can cause problems, showing up in erratic
velocity, extreme gas consumption and in general a poor day. This marker was
designed to perform at lower pressures. If you were to keep the gauge on the
side of the gun set at 250-300 and do the rest of your adjustments with the low
pressure regulator, you would be operating the marker within the range in which
it was designed.
Leak Related Problems
1. The BKO has a leak down the barrel. Reason: gas is leaking through or
around the valve pin seal or Oring area.
a. Can you hear the leak when the gas is removed? Yes? There is no
leak. You hear the ocean.
b. The valve seal is marred/scratched or worn out or dirt has
gotten to it. Replace it.
2. The BKO has a leak around the high pressure regulator seam. Reason:
the seal between the regulator body and the main body or the regulator
adapter is bad.
a. Tighten the regulator to the body.
b. Check and/or replace the O’ring.
3. The BKO has a leak around the low pressure regulator seam. Reason: the
seal between the regulator body and regulator adapter body is bador the
regulator has loosened up.
a. Tighten the regulator into the body.
b. Check and/or replace the O’ring gasket. Sized -019.
4. The BKO has a leak inside the grip/battery area.
Reason: the 3-way valve is leaking.
a. Check for over-pressurization from the low pressure regulator. Re-adjust
the low pressure regulator per instructions on the previous pages.
b. Tighten the 3-way valve to the manifold. Take care not to over-tighten.
c. Replace the solenoid/valve assembly.

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Ball Breakage Problems
1. The ball breaks in the breech.
a. The balls in your loader can bind, messing up your trigger
timing.
Note: the ball drop and use an agitated loader.
b. As you run and shoot, you actually unweigh the gravity-fed balls in
your loader. This can cause a ball to hesitate in its drop. This affects
your trigger timing.
c. If the ball retention ball does not move freely, the paintballs will crush
against it or it may have stuck in the depressed position allowing double feeding.
Check its tension regularly and keep this area as clean as possible.
d. If the ball retention ball is too sloppy, the ball will not be held in the proper
position. This may allow the next ball to enter the path of the bolt, subjecting it to
impact cracking or shearing. Verify the tension.
Regulator Related Problems
1. The gauge reads correctly when charged, but climbs in pressure after a
few moments.
a. The regulator seal has been contaminated. Disassemble the regulator, and
clean the seal with a Q-tip and alcohol. If you need assistance in the
Disassembly of the regulator, please call [phone].
2. The gaugereadscorrectlywhencharged, but drops inpressureaftera few
shots.
a. The regulator may not be adjusted correctly. Remove all pressurized gas,
and back off the regulator adjustment screw 3 turns. Pressurize thesystemand
adjust the pressure back up to the desired pressure.
3. The gaugereadscorrectlywhencharged, but drops inpressureaftera few
shots, and is slow to climb back to normal pressure.
a. The recovery side of the regulator is sluggish and may need cleaning and
lubrication. If you need assistance in the disassembly of the regulator, please
call [phone].
b. The regulator seal needs to be replaced if it has a deep groove in it from the
regulator cup.
Replacing or removing the original regulators voids all warranties.
Battery Related Problems
1. LED functions but the marker does not fire.
2. Alternately missed shots.
3. Velocity drops while firing several shots.
4. Erratic Velocities. Jumps of 20 fps or more.
5. Unexplainable paint breakage.
6. Slight leak from the solenoid in the back of the grip.
a. Change the battery. The LED only requires 1½ volts to function. The
solenoid requires a minimum of 5 volts to operate. This means the marker
may appear to be getting enough power when it is not. All batteries are
NOT created equal. Performance will vary. Therefore, if you experience
any erratic behavior, always change the battery first.