Heckler & Koch MR762 A4 7.62 NATO Complete Upper Receiver Kit - 13"

The MR762 A4 Upper Receiver Kit – 13″ is a fully assembled upper-receiver and barrel solution designed for your next compact AR-10 build. It employs the proven HK short-stroke piston and pusher-rod system rather than a traditional gas tube, keeping heat and carbon fouling out of the receiver area for enhanced reliability and ease of maintenance. This kit includes a 13″ cold-hammer-forged barrel, upper receiver with forward assist, an extended convertible charging handle, HK free-floating rail system handguard, complete bolt group assembly, tungsten-filled buffer, proprietary buffer spring and adjustable gas block. It comes shipped in a soft case and is compatible with an MR762 lower receiver. Experience the dependable performance offered by a system derived from elite-level HK platforms without sacrificing AR-style ergonomics or parts commonality.

Features:

• 13″ Cold-hammer-forged barrel chambered in 7.62×51 mm NATO / .308 Winchester
• Complete upper receiver/barrel assembly compatible with MR762 lower receivers
• Short-stroke piston and pusher-rod operating system that removes hot gases and carbon from the receiver area
• Upper receiver includes forward assist and extended convertible charging handle
• Free-floating HK rail system handguard for accessory mounting and consistent barrel harmonics
• Includes complete bolt group, tungsten-filled buffer, proprietary buffer spring, and adjustable gas block
• Threaded barrel (5/8×24) for suppressors or muzzle devices
• Ships in an HK soft case