Caliber:.223 wylde chamber for 5.56mm and.223 caliber.Lower receiver:forged rra lar-15m.Upper receiver:forged a4.Barrel:16-inch lightweight fluted bead blasted stainless.Steel, cryogenically treated, 1:8 twist.Muzzle:rra fred eichler series brake / 1/228 thread.Gas block:low profile gas block.Trigger:rra two stage varmint trigger.Trigger guard:rra winter trigger guard.Safety selector:star safety.Charging handle:extended charging handle latch.Handguard:rra fred eichler series carbon fiber free float handguard, extended length with full length top rail.Buttstock:rra operator car stock.Pistol grip:hogue rubber grip.Weight:6.9 pounds.Length:33.5 inches.Accuracy:3/4 moa at 100 yards.Includes:one magazine, rra case, manual and warranty information.Note:fred eichler series handguards and other parts specific to this model are not available separatelyAction: Semi-AutoCaliber: 223 WyldeBarrel Length: 16"Capacity: 20+1Safety: Safety Selector SwitchOal: 33.50"Weight: 6.90 lbsStock Description: Adjustable RRA Operator CARMuzzle: Fred Eichler Series BrakeReceiver Material: AluminumSights: Optic ReadyBarrel Description: 16" Fluted Stainless SteelTwist: 1:8"Barrel Length Range: 16" to 16.99"Weight Range: 6 lbs to 6.99 lbsHand: RightStock Finish Group: Black