Rock river arms lar-15m features a forged rra lar-15m lower receiver; forged a4 upper receiver; rra beast brake; low profile gas block; two stage trigger; lightweight aluminum free float rail, 13"extended length, mlok compatible buttstock; 6 position operator car stock; hogue rubber grip and accuracy 1.5 moa at 100 yards.Includes one magazine, case, manual and warranty information.Caliber: 458 SOCOMBarrel Length: 16"Capacity: 30+1Trigger: Two-StageOal: 37"Weight: 7.60 lbsStock Description: 6 PositionMuzzle: RRA Beast BrakeReceiver Material: SteelBarrel Description: Threaded BullTwist: 1:14"Weight Range: 7 lbs to 7.99 lbsStock Finish Group: Black