Heckler & Koch MR762A4 Complete Upper Receiver Kit 7.62x51mm 16"

The Heckler & Koch MR762A4 is a complete AR-10 upper receiver kit chambered in 7.62x51mm NATO, built around a 16" cold hammer forged steel barrel. This upper features HK's proven direct impingement gas system with carbine-length gas tube. The barrel is threaded 5/8x24 for muzzle device attachment. This complete upper receiver assembly is engineered to HK's exacting standards for precision and reliability.