The black rain ordnance ssp + ssp model features a socom profile 4150 chromoly barrel, nickel boron coated bcg, and a magpul moe-sl buttstock.It also utilizes a magpul moe grip, 15" m-lok slim handguard, and an a2 flash hider.Metal Finish: Midnight Bronze Cerakote/Black NitrideAction: Semi-AutoCaliber: 5.56x45mm NATOBarrel Length: 16"Capacity: 30+1Oal: 34.50"Weight: 7.50 lbsStock Description: Adj Magpul MOE SLMuzzle: A2 Flash HiderReceiver Material: 7075 T6 AluminumSights: None, Optic ReadyBarrel Description: 4150 Chrome MolyTwist: 1:7"Barrel Length Range: 16" to 16.99"Weight Range: 7 lbs to 7.99 lbsHand: RightStock Finish Group: BlackMetal Finish Group: Brown/Tan