Windham weaponry’s rmcs-4 kit offers four calibers in the same ar platform by simply changing out barrels, magazine wells, and if necessary, the bolt/bolt carrier and magazine.The 9mm barrel has a melonite finish, and the other barrels are chrome-lined for long wear and easy cleaning – machined from 4150 chrome moly vanadium steel and finished in black manganese phosphate.The receivers are cnc machined from forged 7075 t6 aircraft aluminum with a black hardcoat anodized finished, and the bolts are machined from carpenter 158 steel.
Metal Finish: Black Hardcoat Anodized
Caliber: 223 Rem,300 BO,7.62x39mm,9mm
Barrel Lengths: 16.20″
Weight: 7 lbs
Stock Description: 6 Position
Barrel Type: Interchangeable