Tacfire's 300 bo unassembeld pistol build kit includes: 7.5" parkerized barrel with pistol gas system (usa made); 5.56/300 bo nato bolt carrier group (usa made); 7" ultra slim keymod free-float handguard with detachable rails; lower parts kit included with trigger and hammer (usa made);.750 gas block; pistol length gas tube; standard receiver end plate; mil-spec/commercial castle nut; mil-spec buffer tube; 3 oz buffer; buffer tube spring; mil-spec charging handle; dust cover; forward assist; 5/8"-24 thread bird cage a2 muzzle brake; pistol grip (usa made) and upper receiver 5.56/223/300bo with m feed ramps (usa made).

Finish: Black
Model: AR-15 Pistol Build Kit
Material: Steel
Thread Pattern: 5/8"-24 tpi