Rock river arms x-1 rifle comes out of the box without any changes needed to be made.This rifle has a custom operator carbine stock, hogue grip, two stage trigger, winter trigger guard, low profile gas block, 18 inch fluted barrel, hunter muzzle brake, free float rail, an 1 moa accuracy.This tactical long range rifle comes in a rock river arms case with one magazine.Its is optic ready for the shooters choice.Action: Semi-AutoCaliber: 308 WinBarrel Length: 18"Capacity: 20+1Trigger: Two-StageSafety: Safety Selector SwitchOal: 40.50"Weight: 9.50 lbsStock Description: RRA A2 OperatorMuzzle: RRA Hunter Muzzle BrakeReceiver Material: AluminumSights: Optic ReadyBarrel Description: 18" Fluted Stainless SteelTwist: 1:10"Barrel Length Range: 18" to 18.99"Weight Range: 9 lbs to 9.99 lbsHand: RightStock Finish Group: Black