The TacFire AR-10 .308 / 7.62x51 Unassembled Rifle Kit w/ Lower Parts Kit without Forward Assist includes a .308 / 7.62x51 bolt carrier group (BCG), charging handle, stripped upper receiver and port door, complete lower parts kit with fire control unit and pistol grip, gas tube and gas block, barrel with 1:10 twist and 5/8x24 threads, standard bird cage muzzle brake with crush washer, M-LOK® handguard, buffer kit (buffer spring, buffer weight, buffer tube, castle nut, and end plate), and adjustable butt stock. Product comes unassembled. Does NOT include lower receiver or forward assist