The Troy MRF is the strongest user-installed free-floating rail system in the world. Troy MRFs are available for all M16/M4 weapon systems equipped with the original factory barrel nut. The MRF's patented mounting system reinforces the barrel nut with a sturdy clamp and anti-rotation alignment lugs. Troy MRF BattleRails provide an uninterrupted rail extension and hand guard aligned perfectly with the host weapon's flat-top receiver. Accepts Quick-Detach 360 Push Button Swivel - 12" MRF-CX Extended. For all M16/M4 Rifles w/ standard front sight - Accepts Quick-Detach 360 Push Button Swivel. - Black
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