The TACFire AR-15 Rifle Build Kit contains all the parts you need, minus the lower receiver, to custom build your own rifle. This kit includes a parkerized 5.56 NATO 16" barrel with a 1:8 twist, bolt carrier group, 1/2" x 28 threaded bird cage A2 flash hider, 5.56/.233/.300AAC upper receiver with M4 feed ramps, standard receiver end plate, lower parts kit with mil-spec trigger and hammer, carbine length gas tube, .750 low-profile gas block, mil-spec six-position stock and A2 pistol grip, forward assist, dust cover, slim 15" MLOK free float hand guard, aluminum mil-spec buffer tube, 3 oz buffer, recoil buffer spring, mil-spec aluminum charging handle and mil-spec steel castle nut. TACFire was founded in 2010 with the goal of providing the highest quality parts required for tactical weapons. The forward assist is non-working but for aesthetics only. No FFL required for purchase!