Windham RMCS-2 Multi-Caliber Rifle Kit 5.56mm/.300 AAC Blackout 16 Inch Barrels MCS Flat Top Upper MCS Lower With Telestock 30 Round

Two calibers in one AR platform rifle. Simply change out barrels to switch from 5.56mm NATO (.223) to .300 AAC Blackout. Barrels are chrome-lined and machined from 4150 Chrome Moly Vandium steel finished in black manganese phosphate. Receivers are CNC machined from forged 7075 T6 aircraft aluminum and finished in hardcoat black anodize. Bolts are machined from Carpenter 158 steel. MCS flat top upper receiver with integral, railed free-float forend and designed for easy barrel change. MCS lower receiver with telestock. All barrels are clearly stamped with appropriate caliber markings. Ships in a heavy duty, custom die cut, foam-lined, lockable rifle case.