Heckler & Koch MR762 A4 Upper Receiver Kit 7.62x51mm 16" Matte Black

The Heckler & Koch MR762 A4 Upper Receiver Kit is a factory-built 7.62x51mm NATO/.308 Winchester assembly that includes a complete upper receiver and 16-inch barrel. It uses HKs short-stroke gas piston and pusher-rod operating system to help keep heat and carbon fouling out of the receiver area, supporting reliable function and easier maintenance. This matte black upper is designed to pair with compatible 7.62mm AR-style lowers and HK MR762 lowers for creating a piston-driven rifle configuration.

• Complete MR762 A4 upper receiver and 16-inch barrel
• 7.62x51mm NATO and .308 Winchester chambering
• Short-stroke piston and pusher-rod operating system

This MR762 A4 Upper Receiver Kit offers a ready-to-use HK upper solution for users seeking a 7.62x51mm platform built around HKs piston system. It serves as a strong foundation for a durable, high-performance .308/7.62 NATO rifle build.