HK MR762 A4 Pistol | 7.62x51mm | 13″ | 81001053

The Heckler & Koch MR762 A4 is a commercial variant of the HK417 platform offered in a 13-inch pistol configuration for users seeking a compact, piston-driven 7.62x51mm option. It features a match-grade cold-hammer-forged barrel, a continuous Picatinny rail, ambidextrous controls and an M-LOK handguard with integral QD points. For optics under $1,000 that suit this platform, the Vortex Viper PST 1-6×24 provides fast target acquisition at close range and usable precision across typical engagement distances for this cartridge.

Typical applications for this pistol include precision-oriented range work and medium-game field use where a compact, rifle-caliber platform is preferred.

Product Specifications

• The manufacturer is Heckler & Koch / H&K.
• The model is MR762 A4.
• The manufacturer’s part number is 81001053.
• The caliber is 7.62x51mm.
• The barrel measures 13 inches and is threaded for 5/8×24 muzzle devices.
• The listed NFA thread pattern is 5/8×24.
• The operating principle is a Gas operated short stroke piston system.
• The bolt system is a Rotating bolt.
• The trigger system is a Two-stage trigger.
• The handguard uses an M-LOK interface and includes integral ambidextrous QD cups.
• The receiver and furniture finish is Black anodized.
• The overall length is 31.4 in.
• The weight without magazine is 7.95 lb.
• The rate of twist is 1-in-11 in (RH).
• The UPC is 642230272477.

The MR762 A4 pairs modern HK ergonomics and ambidextrous controls with a short-stroke piston system and a medium-contour, match cold-hammer-forged barrel to deliver controllable performance from a compact platform. The continuous top rail and M-LOK handguard support a wide range of accessories for precision or field setups without compromising handling.

Owners and reviewers have described this model as an enhanced example of “no compromise” HK performance.