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FN America, FN15 M4, Military Collectors Series, Semi-automatic Rifle, 223 Rem/556NATO, 14.7" Barrel (16" OAL with Pinned Brake), 1:7 Twist, Carbine Length Gas System, Black Finish, 6 Position Collapsible Stock, 30Rd, Knights Armament M4 Carbine Rail Adapter System (RAS), Vertical Grip Included Direct Impingement Hard-Anodized Aluminum Receiver Chrome-Lined Barrel Ambidextrous Selector Product Description Own a piece of firearm history from the makers of the world's most battle-proven firearms. The FN 15(R) Military Collector Series M4 brings to market a military replica rifle made to FN's, and the U.S. military's exacting specifications. UPC 845737006211 Manufacturer FN America Manufacturer Part # 36318 Model FN15 Model M4 Action Semi-automatic Type AR Caliber 556NATO Caliber 223 Remington Barrel Length 14.7" Pinned (16" OAL) Color Black Grips Polymer Accessories Knights Armament M4 Carbine Rail Adapter System (RAS) Type of Barrel 1:7 Capacity 30Rd Description Carbine Modern Sporting Rifles