Windham RMCS-4 Multi-Caliber Rifle Kit

Four calibers in one AR platform rifle. Change from 5.56mm NATO (.223) to .300 AAC Blackout to 7.62x39mm to 9mm. Simply change out barrels, magazine wells and, if necessary, the bolt/bolt carrier and magazine. Barrels are chrome-lined and machined from 4150 Chrome Moly Vandium steel finished in black manganese phosphate (except 9mm is Melonite finished and not chrome-lined). 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. Includes 1913 railed gas block, bayonet lug, sling swivel and A2 flash hider. MCS lower receiver with telestock. Includes one standard magazine for .223/.300 and one Magpul AK type magaine in 7.62x39, plus one 9mm Colt-type. All barrels are clearly stamped with appropriate caliber markings. Ships in a heavy duty, custom die cut, foam-lined, lockable rifle case.