The raidermc 556 sbr pistol features a threaded, match grade monobloc barrel with an integrally machined gas block; 10.38" free floating picatinny rail; forged aluminum upper and lower receivers; m16 bolt carrier group including charging handle and buffer tube/spring; custom trigger guard; monobloc ejection port cover; custom qd end plate' and hd defense adjustable close quarter (cbq) stock and enhanced grip.Includes magazine.Caliber: 223 Rem/5.56 NATOBarrel Length: 12.50"Capacity: 30+1Grips: Black PolymerSights: NoneWeight: 5.12 lbsStock Material: SyntheticStock Finish: BlackBarrel Length Range: 12" to 12.99"Weight Range: 5 lbs to 5.99 lbs