The C4 enhanced battle carbine is adaptable to whatever your mission calls for. Weighing in at under 6 lbs and delivering non stop performance and reliability. The C4 features our black salt nitrate barrel and bolt carrier group for a long dependable life. Barrel: 16" 1/7 twist Hand guard: 12" aluminum keymod Buttstock: UTG Pro S1 mil-spec 6 pos Upper & Lower Receivers: Precision machined from 7075 T-6 aluminum forgings (billet available) Trigger: RTD single stage combat Features: MagPul pistol grip and trigger guard 30 round PMag inc PLEASE NOTE: It is the purchaser’s responsibility to obtain a transferring FFL dealer to complete this purchase. Please have your dealer fax or email us a copy of their FFL license as soon as your order is placed. FFL's can be emailed to firstname.lastname@example.org or faxed to 603-782-5032. Make sure your name and phone # are clearly indicated in the fax or email to avoid any processing delays.