Wilson Combats Protector Carbine rifle features MilSpec forged upper and lower receivers match grade stainless barrel with QComp flash hider and a midlength gas system for enhanced reliability and durability with low profile gas block. It utilizes a MLOK compatible handguard with a 4 accessory rail and QD sling mount nitride coated precision BCG M2 twostage TTU trigger and a WilsonRogers superstoc buttstock with BCM Starburst pistol grip. - CALIBER .223 REM/5.56MM NATO - MAGAZINE (1) magazine with 30rd capacity - BARREL 6" Round, 1/2"x28 Threaded Muzzle with Q-Comp - RECEIVERS Mil-Spec Hard Anodized - HANDGUARD Wilson Combat M-LOK Rail - TRIGGER TTU (Tactical Trigger Unit) M2, 4# - STOCK Wilson/Rogers Super-Stoc