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The H&K MR762 A4 SBR is the civilian descendant of the battle-proven HK417, shrunk down to a 13-inch barrel without HK cutting a single corner along the way. Chambered in 7.62x51mm NATO (.308 Win), it measures just 31.4 inches overall and weighs right around 7.95 pounds without a magazine, which makes it one of the more maneuverable big-bore platforms you can get your hands on. This particular model ships with one 10-round magazine and carries manufacturer part number 81001055. Keep in mind this is a factory short-barreled rifle and an NFA-regulated item.
At the core is HK's short-stroke gas piston operating system, the same architecture that earned the HK416 and HK417 their reputation with military and special operations units worldwide. Instead of dumping hot carbon fouling back into the action like a direct impingement gun, the piston drives the bolt and vents the dirty gas forward. The result is a rifle that runs cooler, stays cleaner, and shrugs off long strings of fire with less maintenance and less wear on internal parts. There's also a two-position adjustable gas regulator marked for normal and suppressed use, so you can tune the gun for whatever you're running up front.
The 13-inch barrel is cold hammer forged from HK's cannon-grade steel and wears a 1-in-11 right-hand twist with four lands and grooves, a combination that stabilizes everything from 147-grain NATO ball up through 168 and 175-grain match loads. The muzzle comes threaded 5/8×24, the standard pitch for .30-caliber suppressors and muzzle devices, so mounting a can or brake is straightforward. Up top you get a full-length Picatinny rail for your optic of choice, and the free-float M-LOK handguard leaves plenty of real estate for lights, lasers, and hand stops.
The MR762 A4 runs a fully ambidextrous lower, with the safety selector, magazine release, and bolt catch all mirrored for lefties and righties alike. Paired with the HK416-style slimline furniture, the whole package handles like a rifle that was refined over years of real-world service, because it was. It ships without sights, which suits most buyers headed straight to an LPVO or red dot.
The MR762 A4 SBR is chambered in 7.62x51mm NATO, which also accepts .308 Winchester. The 1-in-11 twist handles a wide range of bullet weights, from 147-grain NATO ball through heavier 168 and 175-grain match loads. Despite what some listings show, this is not a 5.56mm rifle.
Yes. The 13-inch cold hammer forged barrel comes factory threaded 5/8×24, the standard pitch for .30-caliber muzzle devices and suppressors. The two-position adjustable gas regulator also lets you tune the gun for suppressed or unsuppressed shooting.
The biggest difference is the operating system. HK's short-stroke gas piston keeps hot carbon fouling out of the action rather than venting it back into the receiver like a direct impingement AR-10. That means cooler, cleaner running, less maintenance, and the reliability that comes from HK417 military heritage.
No, it ships without iron sights. It does feature a full-length Picatinny top rail, so you can mount the optic of your choice, whether that's an LPVO, a red dot, or a magnified scope. Most buyers set it up with glass right out of the gate.
| UPC | 642230272514 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 81001055 |
| Shipping Weight | 15.4 |
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