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, 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.

The LPR has five components and six seals

1 Piston large o-ring (012 BN70) 6 Piston small o-ring (006 UR90)

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

3 Piston spring 8 Seal retainer o-ring (010 BN70)

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

5 Body o-rings (3pcs, 012 BN70)

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 (refer to

figure 2):

1 Take frame off the marker.

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

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

4 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.

5 Put everything back in reverse order. Be sure to grease the #012 o-rings, so as to

prevent cutting them upon installation.

6 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