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Mfg Item #: FP10.5-5.56M4-10FCR-SBA3
The Radical Firearms 10.5" M4 Profile 5.56mm AR Pistol uses MIL-STD Upper and lower receivers along with a 10" FCR free-float rail system for increased accuracy, keeping your hands cool, and giving you plenty of room for accessories. It utilizes a SB-Tactical SBA3 5-position adjustable pistol brace.