To use it you will also need an M4 AEG magazine

and include O Rings

built to withstand thousands of rounds

SHOOT QUIETER THUS NOT GIVING AWAY YOUR POSITION

Double O-Ring design for better air sealing

PTS UNITY TACTICAL FAST FTC 30MM MAG MOUNT Sig Air To use it you willUnity Tactical FAST is a series of optic mounts that provide end users with a 2. 26" centerline optic height. This optic height more rapid visual processing of the battlefield by ensuring an ergonomically correct heads up posture. Further, they provide faster and easier dot reticle acquisition while wearing night vision goggles, protective masks, plate carriers and other gear. FAST FTC Magnifier Mounts feature the first ever Flip To Center (FTC)