Windham Weaponry's Multi-Caliber Upper Receiver Assembly Kit is designed as a unique upgrade for the AR15-type rifle, offering quick and easy caliber changes by simply switching out the barrel, and if necessary, the bolt/bolt carrier and magazine. Add the optic or iron sights of your choice, and this kit is "ready for the range." The barrel is chrome-lined and machined from 4150 chrome moly vanadium steel with a black manganese phosphate finish. The upper receiver is CNC machined from forged 7075 T6 aircraft aluminum with a hardcoat black anodize finish. The MCS 1 Kit includes a complete upper receiver assembly with .223/5.56mm caliber M4 barrel assembly; integral railed forend; (with barrel release levers, and barrel retaining block). Additionally, a .300 Blackout caliber barrel assembly is included allowing the change between .223/5.56mm caliber and .300 Blackout caliber by utilizing the same bolt/bolt carrier and .223 magazines. The .223/5.56mm bolt/bolt carrier and .223 magazines are utilized. The .300 Blackout caliber barrel assembly is complete with railed gas block, gas tube, and A2 flash hider.
No reviews have been written for this product.