The FDR-15 is built around a .223 Wylde chamber that accepts both 5.56 NATO and .223 Remington with no compromises in performance, and features 7075-T6511 receivers. 7075-T6511 is heat treated and stress relieved, resulting in one of the strongest variants of 7075 aluminum, delivering superior rigidity and durability. The match-grade 10.5" barrel delivers superior accuracy, and comes with an F-1 angled-face compensator that redirects propellant gasses to reduce recoil and control muzzle lift. The M-LOK handguard accommodates a variety of modern accessories, and the Magpul(R) MOE(R) pistol grip provides superior feel compared to standard A2 grips. It all adds up to exceptional accuracy, maneuverability, and modularity. PLEASE NOTE: Magazine not included. Accepts standard AR mags. - CALIBER .223 WYLDE - NO MAGAZINE - BARREL 10.5" with angled compensator - RECEIVERS forged-aluminum - TRIGGER Mil-Spec - BRACE Blade Brace