PGI MAYHEM User manual

MAYHEM
OWNERS MANUAL
Manufactured by
Paintball Guns International
MAYHEM

Table of Contents
Specifications . . . . . . . . . . . . . . . . . . . . . . 2
Parts diagram and Listing . . . . . . . . . . . . . 3
Description of Marker Operation. . . . . . . 4
Getting Started . . . . . . . . . . . . . . . . . . . . . 5
Changing Angle of Drop Tube . . . . . . . . . . 6
Bolt and Poppet Removal . . . . . . . . . . . . . 7
Cleaning and Maintenance . . . . . . . . . . . . 8
Ball Detents . . . . . . . . . . . . . . . . . . . . . . . 9
Warranty . . . . . . . . . . . . . . . . . . . . . . . . 10
IMPORTANT: Read through this
manual before operating your paintball
marker. Read all directions before
proceeding to make any repairs of
modifications to this marker.
SAFETY
• Read the entire manual before using the Mayhem.
• The Mayhem is not a toy. It can cause serious injury or death.
• Wear approved eye and head protection, even when test firing.
• The compressed air source used with the Mayhem can cause serious injury or death.
• Sale or use of the Mayhem is not intended for individuals under the age of 18.
• The Mayhem is to be used only as described in this manual.
• Fire only 0.68 caliber paintballs from the Mayhem.
• Check the velocity of your Mayhem before each use. Not to exceed 300 fps.
• The Mayhem can fire when dropped.
• Keep the Mayhem unloaded and unpressurized when not in use.
• Install a barrel plug in the barrel when not in use. (One is included.)
• Replacement barrel plugs are available from your PGI dealer.
• Handle the Mayhem as if it is always ready to fire. It recocks during firing.
• The Mayhem can be dangerous up to 200 yards (180 meters).
• Don’t shoot at opponents closer than 20 feet.
• Never shoot toward individuals not wearing approved eye and head protection.
• Never disassemble the Mayhem while it is pressurized.
• Do not touch a chilled CO2container with bare skin; frostbite can occur.
• Do not use the Mayhem while under the influence of drugs or alcohol.
• Never shoot at the property of others.
• Learn and follow the rules of the field where you are playing.
• Always maintain control of the Mayhem while it is pressurized.
• Never store the Mayhem while it is pressurized.
• Do not modify your gun, especially your trigger assembly.

Caliber
◗0.68 Paintballs only
Closed Bolt Semi-Automatic Powered By
◗Compressed CO2
◗Regulated Compressed Air
◗Regulated Nitrogen
Weight
◗3.0 lbs. (not including loader or air source)
Ball Feed
◗Can be located in any of the three positions
◗7/8 inch O.D. accepts standard feed loader adapters
Muzzle Velocity
◗Under 100 fps to over 300 fps
◗Adjustable - External Pressure Regulator
Barrel
◗Aircraft Quality Aluminum
◗Microhoned and Polished
45 Grip One-Piece Trigger Frame
◗Ergonomic “Point and Shot” Design
◗Accepts Standard 45 Grip Pads
◗Complies with Industry Standard 2 Hole Bottomline
Optional accessories
◗Expansion Chamber
◗Rechargeable 9 Volt Battery and Charge
2
Mayhem Specifications

3
Barrel ..............................................1
Breech.............................................2
Ball Detent and Spring ....................3
Cylinder ..........................................4
Drop Tube ......................................5
Top Mounting Screw.......................6
Site Rail...........................................7
Mainspring ......................................8
Bolt.................................................9
Poppet.............................................10
Valve Housing .................................11
Valve Housing Cap..........................12
Valve Housing Cap Screws ..............13
Solenoid ..........................................14
Cover and cover screws ...................15
Spool Valve......................................16
Adapter Plate...................................17
Bottom Mounting Screws................18
Large Mounting Screws...................19
Pressure Regulator...........................20
Hose ...............................................21
Grip ................................................22
Grip Mounting Screws.....................23
Grip Frame......................................24
Parts Diagram Listing
22
23
1
8
9
2
3
5
6
7
4
11
11
14 12
13
21
10
17
19
24
20
18
16
15

The Mayhem is a fully pneumatic paintball marker. It fires from
a closed bolt position. This means that the ball is loaded into the
breech, and is at rest before the trigger is pulled. Accuracy is
improved with this method. Unlike other markers the angle of
the drop tube can be changed from the left side to the right side
as well as center. This allows for playing different positions on
the field. Operation is as follows:
1. A CO2or HPA source is connected to the
bottom line.
2. The pressure regulator reduces the
incoming gas pressure to approxi-
mately 100 PSI.
3. The air flow is administered to
the gun body through the rear
base connection. Gas flows
through the spool valve and
the poppet into the main cham-
ber pushing the bolt closed, and
loading a ball into the breech.
4. When the trigger is pulled the poppet
moves to the rear allowing the gas trapped
in the main chamber to escape through the bolt
propelling the ball out of the barrel
5. When the pressure in the main chamber is reduced to 0 PSI
the main spring pushes the bolt open allowing the next ball
to fall into the breech.
6. When the trigger is released the process is reset.
Note: Breeches to fit all barrel threads are available. There are
three main parts to the marker body, they can all be inter-
changed with different colors to customize the
marker. Drop Tubes are screwed in and
can also be interchanged.
Caution: The Ball Detent in this
marker uses a small spring that is
under tension. When sliding
the cylinder off of the breech,
the spring will pop out and
can be easily lost, take care to
prevent this from occurring as
the spring is small and difficult
to see!
Description of Markers Operation
4

Getting Started
1. Unpack the paintball marker from the box
and inspect for any damage.
2. Install 9 volt battery. (See battery installa-
tion instructions on page 8)
3. Install barrel by screwing it clockwise into
the breech. (See figure 1)
4. Set the safety to safe position. (See figure 2)
5. Connect propellant source to the back of
the pressure regulator. (See figure 3)
6. Inspect the gun and tank for any leaks.
7. Connect hopper to the gun. (See figure 4)
8. Remove barrel plug and take the gun
off of safety.
9. Cycle the trigger. The gun should operate
with a sharp popping sound.
10.Load paintballs into the hopper and
chronograph the gun, at approximately
280 ft/sec.
Set the ball velocity by adjusting the screw
on the front of the regulator. Clockwise
increases the velocity, and counterclockwise
reduces the velocity. Allow several shots for
the velocity to stabilize after making any
changes. (See figure 5)
Figure 1 Figure 2
Figure 4
Figure 5
Figure 3
5

Changing Angle of the Drop Tube
The angle of the drop tube may be changed
between left side, right side, and center drop,
as the player prefers. (See figure 6)
! WARNING !
Never put your finger down the drop tube as
serious injury could occur.
1. To accomplish this the large mounting
screws on the frame of the Grip must be
removed. (See figure 7)
2. The next step is to disconnect the electrical
plug from the side of the grip frame.
(See figure 8)
3. Next separate the grip frame from the
gun body. (See figure 9)
6
Figure 6
Figure 8
Figure 7

5. Remove the front bottom mounting screw
from the adapter plate.
6. Remove the top mounting screw from the
gun body. (See figure 10)
7. The Drop tube angle can now be changed
by rotating the gun body to the desired
position. (See figure 11)
To reinstall just reverse the procedure.
1. Unscrew drop tube.
2. Separate tube from valve housing.
3. The bolt can now be removed.
4. Access to the Poppet is also available.
5. To install, lubricate O-rings and reverse the
procedure.
7
Bolt and Poppet
Removal
Figure 9
Figure 10
Figure 11
Changing Angle of the Drop Tube (continued)

Cleaning and Maintenance
Battery Replacement
The 9 volt battery is located in the grip of the
gun.(See figure 12) To access the battery the
four screws that hold the grip to the gun must
be removed. (See figure 13) Install the battery,
terminals first. (See figure 14)
NOTE
The battery should last approximately 40,000
shots. Rechargeable batteries and charger’s are
available as an option.
8
Figure 12
Figure 14
Figure 13

Ball Detents
Caution
The Ball Detent uses a small spring that is
under tension. When sliding the cylinder off
of the breech, the spring will pop out and can
be easily lost, take care to prevent this from
occurring, as the spring is small and difficult
to see! To prevent spring loss, remove cylinder
slowly and cover spring loaded ball detent
with a finger when separating the cylinder
from the breech.
1. There are two detents used in the marker.
The first is a spring loaded detent to stop
double ball loading. (See figure 15)
2. A second ball detent is used to hold balls in
the breech before shooting. (See figure 16)
9
Figure 15
Figure 16
Caution: Spring loaded Ball Detent
Second
Ball
Detent

Warranty and Repair Policy
PGI offers a 90 day warranty from date of purchase
on all of our products. This warranty covers any
defects in manufacturing or workmanship and will be
free of charge. This does not include lost parts or
damage incurred after the purchase of the marker. If
any parts need replacement they can be ordered
directly from PGI. All repairs made after warranty, or
not covered by warranty will be charged for parts and
labor. If your marker requires additional work or
repairs, call our gun techs and they will inform you if
you need to send your gun in for repairs. When you
send your gun in for repairs please include a brief
statement of requested repairs, as well as your name,
return address, and a telephone number where you
can be reached during normal business hours.
All Warranty Inquiries, Parts Replacement and Returns need to be addressed to:
PGI Paintball Guns International
1-714-998-7085
10