Krytac M4 Receiver Pin set, frame pins

Hex socket head cap screws for M4/M16 series AEG airsoft guns. Instead of a normal pin, the pin stays firmly in place and prevents the cap pins from falling out even when going hard. Fits Krytac, Marui, Lonex and G&P compatible frames.

Please note that after installation, the Allen screws must always be loosened before the pin comes off the frame!