Fab Defense NFR RL Rifle Length for M16, M4 & AR15 carbines – 4 picatinny rails (top, bottom, left & right – for carrying tactical accessories, better overall strength and excellent heat dissipation). Made of 6061 T6 aluminum, hardened anodized coating, level marking in the gaps, perfect alignment with the receiver, fixing on the cylindrical nut and via 06 fixing points – the barrel remains floating, designed exclusively for “Rifle Length” carbines.
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