HK

Like its 5.56 mm counterpart, the MR762A1 is a direct semi-automatic descendent of the HK416/417 series. It is assembled in the USA using US and German-made components and uses many of the same parts and assemblies developed for the legendary HK416 and 417.

This latest update to the MR762A1 includes an updated grip and forearm as well as a lighter barrel profile that removes nearly a pound of front-end weight from the rifle.

Like the HK416/417, the MR762A1 uses a proprietary HK short- stroke gas piston in place of the direct-gas-impingement system found on lesser AR15-style rifles that propels exhaust gas into the upper receiver to operate the action. In the “closed” HK piston system, exhaust gasses never enter the receiver, which means the HK runs cooler, cleaner. That is where that legendary HK reliability comes from.

When adverse conditions, like dust, sand and mud are introduced, the advantage of the HK system becomes even more drastic. That is why so many of the world’s military and law-enforcement elite customers trust HK.

The MR556A1’s barrel is cold hammer forged from the highest quality cannon-grade steel, with a slightly smaller diameter at the muzzle for improved accuracy and velocity. While the material and cold hammer forging process themselves greatly enhance durability, HK’s processes include many additional steps not taken by other manufacturers to produce superior accuracy and service life, ensuring performance well beyond “mil-spec.”

Caliber 7.62 x 51 mm NATO

Operating principle Gas operated, short stroke piston

Bolt system Rotating bolt

Magazine 10/20 rounds

Mode of fire Semi-automatic

Length, maximum (stock extended) 39.50 in / 1003 mm

Length, minimum (stock retracted) 36.00 in / 914 mm

Width 3.23 in / 82 mm

Height 8.39 in / 213 mm

Barrel length 16.5 in /421 mm

Weight Rifle (with empty magazine) 8.84 lb /4 kg

Trigger pull 4.5–5.6 lb / 20–25N ( two stage trigger)

Barrel profile 4 lands & grooves, right twist, 1 in 11.02 in (280 mm)

Sights Optics ready

Adjustable buttstock 6 positions, 80 mm of travel