HK MR762 A4 16.5″ 7.62×51 Rifle, 20RD, Black

The HK MR762 A4 is Heckler & Koch’s civilian HK417, a semi-auto 7.62x51mm NATO rifle built on the same short-stroke piston design as the rifles HK supplies to military units around the world. This is the 16.5″ model (HK part number 81000829) in black, shipped with one 20-round magazine. The A4 is HK-USA’s latest update to the MR762 line, adding fully ambidextrous controls, a lighter build and a slimmer profile over earlier versions.

Why the MR762 A4 Stands Out

• Short-stroke gas piston: Hot carbon fouling stays out of the action, so the rifle runs cleaner and longer with less wear on internal parts than a direct-impingement AR-10.
• Adjustable gas regulator: Tune the action for suppressed or unsuppressed shooting. If you plan to run a suppressor, this is a big advantage.
• Fully ambidextrous controls: Safety, magazine release and bolt catch work from either side, making the A4 equally easy for left- and right-handed shooters.
• Lighter, slimmer A4 profile: Easier to carry, manipulate and shoot from field positions than earlier MR762 models.
• 23″ full-length Picatinny rail: Plenty of room for a scope, clip-on night vision or thermal, and lights.

HK MR762 A4 16.5″ Specifications

Recommended Optics for the MR762 A4

The MR762 A4 ships without sights, so choosing an optic is the first step. For a do-it-all setup out to roughly 600 yards, a 1-6x or 1-8x LPVO is a popular choice, the same class of optic the U.S. Army pairs with the HK417-derived M110A1 Squad Designated Marksman Rifle. For longer-range steel and precision work, most owners run a 3-15x to 5-25x first focal plane scope in a one-piece 20 MOA mount. Browse our rifle scopes and scope mounts, and stock up on .308 / 7.62 NATO ammo.

HK MR762 A4 FAQ

What is the difference between the MR762 A4 and the MR762A1?

The A4 is HK-USA’s newest version of the MR762. Compared with the older A1, it adds fully ambidextrous controls and is lighter with a slimmer profile, while keeping the same proven short-stroke piston system and 7.62x51mm chambering.

Is the MR762 the civilian version of the HK417?

Yes. The MR762 is HK’s semi-automatic commercial variant of the HK417, the platform behind Germany’s G28 and the U.S. military’s M110A1.

What magazines does the MR762 A4 use?

It uses HK MR762/HK417-pattern magazines, not standard AR-10 or SR-25 magazines. The rifle comes with one 20-round magazine. Extra HK MR762 20-round magazines are a smart add-on.

Is there a shorter version?

Yes. HK also makes the MR762 A4 with a 13″ barrel as a short-barreled rifle. See the HK MR762 A4 13″ SBR.

Can the MR762 A4 ship to my state?

This rifle ships to your local FFL dealer. It cannot be shipped directly to California, Rhode Island or Washington, and it cannot be sold into Illinois. Buying from out of town? We also handle FFL transfers.

Buy the HK MR762 A4 at Black Bayou Armory

Black Bayou Armory is a full-service gun store in Benton, Louisiana, serving Bossier City, Shreveport and the rest of the ArkLaTex. Order the HK MR762 A4 online for free in-store pickup, or stop by to see it in person. Shop more Heckler & Koch firearms.