The pdwr pistol features the aluminum milled handguard with an 8.5" bull barrel.The precision-welded top rail allows the addition of your favorite optic or use the traditional iron sights (included).The end cap is compatible with m4 buffer tubes or the included swivel end adapter.Metal Finish: BlackType: PistolAction: Semi-AutoCaliber: 7.62x51mm NATOBarrel Length: 8.50"Capacity: 20+1Safety: LeverGrips: Black PolymerSights: IronWeight: 8.10 lbsOal: 23.50"Barrel Length Range: 8" to 8.99"Weight Range: 8 lbs to 8.99 lbs