User's Manual

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LPR (LOW PRESSURE REGULATOR) - ADJUSTMENTS AND MAINTENANCE

When servicing your marker:

• Make sure your hopper is removed

from the MATRIX.

• Make sure there are no paintballs in the

breech of the MATRIX.

• Always remove the air supply and

relieve all gas pressure in the MATRIX

before disassembly.

• It is not recommended for the user to

remove the LPR from the body and

disassemble it.

LPR ASSEMBLY, CLEANING, TESTING AND CHANGING SEALS

The Low-Pressure Regulator (LPR) is located in the lower front of the MATRIX (see figure 1). The

function of the LPR is to lower the air pressure supplied to the marker by the in-line, before it reaches

the solenoid. This pressure is used to move the bolt forward and back. The factory setting is 75 PSI.

You can fine tune your MATRIX to its minimum cycle pressure. This will reduce the amount of force of

the bolt hitting the ball (reducing ball breaks) and help with efficiency. Too low of pressure will cause

the bolt to not cycle or move sluggishly or not at all. If you experience dramatic shoot down during

rapid fire, the LPR may be adjusted too low. Too high of pressure will cause the marker not to shoot as

smoothly, potentially increase ball breakage and cause undue wear and fatigue on the bolt

components.

It is important to keep the seat and piston face clean of all dirt and debris. Clean the seat and piston

face and grease the retainer o-ring every six months or 60,000 shots. Every six months, remove the LPR;

clean all dirt and old grease out of the LPR. Inspect all o-rings for damage, and apply new grease to all

the o-rings and sealing surfaces.

The LPR has five components and six seals

1 Piston large o-ring (014) 6 Piston small o-ring (006)

2 Piston 7 Main seal (mounted in the seal retainer)

3 Piston spring 8 Seal retainer o-ring (010)

4 Body 9 Seal retainer (functions as an adjustment screw also)

5 Body o-rings (3pcs, 015)

The only user-serviceable part in the LPR is the seal retainer. This seal needs to be changed in the

unlikely case the LPR is creeping up.

LPR (LOW PRESSURE REGULATOR) - ADJUSTMENTS AND MAINTENANCE

CHANGING THE SEAL RETAINER

1 Screw out LPR cap in front of the marker using a 1/4” Allen wrench.

2 Screw out LPR seal assembly (brass) using a 3/16” Allen wrench.

3 Screw in new LPR seal assembly.

4 Screw LPR cap in place securely.

If the user needs to replace the whole LPR assembly, follow these instructions:

1 Take frame off the marker.

2 Remove the ASA to gain access to the LPR set screw.

3 Screw out LPR set screw using a 5/64” Allen wrench.

4 Screw out LPR cap using a 1/4” Allen wrench.

5 Pull out the LPR by screwing a rod with a 10/32 thread into the seal retainer (brass

piece) inside the LPR and pulling it out.

6 Put everything back in reverse order. Be sure to grease the #015 o-rings, so as to

prevent cutting them upon installation.

7 Tighten LPR cap securely.

The LPR pressure can be set quite accurately even without an LPR test tool. Screwing the adjustment

screw (seal retainer) all the way in will set the LPR pressure to approximately 25 psi. Now turning out

the adjusting screw 180 degrees will increase the pressure by approximately 5 psi. For example, turning

the screw 5 complete turns out will set the pressure to approximately 75 psi. Use a 3/16” Allen wrench

to make all adjustments to the LPR.

Turning the adjustment screw clockwise, or in, will lower the

LPR’s output pressure. Turning the adjustment screw counterclockwise, or out, will raise the

LPR’s output pressure.

Figure 1

WARNING

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