Manual

Figure 48: Wiggle the piston to remove

Warning: Never fire your RFB with the Gas Piston Removed or improperly installed.

Failure to properly install the Gas Piston may result in serious injury. Ensure that the

gas ring is in good shape and not excessively worn. It will be necessary to replace this ring

every 3-5 thousand rounds. A one-piece gas ring designed for the AR-15/M-16 rifle will fit.

The Gas restrictor cap must also be removed for periodic cleaning. First, ensure

that you know how many slots up from the bottom, or closed position; you have your gas

system set and make a note of it. For example: Bottom +7. Now, press down on the spring

loaded Gas System Adjustment Pin with the nose of a dummy round and twist the Gas

restrictor cap open until it comes off and gently reduce pressure on the retaining pin.

Figure 49: Use the nose of a bullet to push the pin in for disassembly

This pin is captive, so it should not be necessary to remove the pin and spring

during regular cleaning. The Gas System is now ready to be cleaned. Be sure to remove all

lubricants and cleaning solvent residue before reassembly. Reassemble in reverse order.

Figure 50: The gas restrictor cap is disassembled and ready to be cleaned

Reassembly of the RFB

To reassemble the RFB after field stripping, first pull the Front Assembly Pin to

the open position. Confirm that the Gas System has been properly reassembled and that

the Gas Piston is properly installed and is flush with the Gas Head in the closed position.

Take the Ejection Chute and insert it through the opening in the grip mount. Align the wings

at the rear of the chute with the slot on the front of the receiver at the top of the ejection

ramp. Slide the front of the Ejection Chute into the slot on the Gas Block. Close the Hand

Guard and ensure that the pin hole on the Gas Block is aligned with the pin hole in the

handguard. Then push in the Forward Assembly Pin.

Now take the Bolt Carrier Group and lay it on top of the receiver and slide it into

the grip mount. If the bolt is hanging down, swing the bolt up and hook it to the carrier, and

move the extractors up. The extractors must be in the up position.