H&K MR762 A4 Pistol 7.62x51mm 13in 20rd

Description

The H&K MR762 A4 Pistol 7.62x51mm 13in 20rd is a factory-built precision pistol that bridges the gap between a compact carbine and a full-size battle rifle. HK’s short-stroke gas piston system keeps the action clean and reliable, even when running suppressed, while the 13-inch cold-hammer-forged barrel delivers match-grade accuracy out of a handgun-sized package. This is a serious tool for shooters who need 7.62 NATO power in a portable, ambidextrous platform.

Manufacturer	Heckler & Koch (per manufacturer specs)
Model	MR762 A4 Pistol
Material	Cold-hammer-forged steel barrel, aluminum handguard, polymer grip
Compatibility	Accepts standard MR762/SR25-pattern magazines
Finish	Hardcoat anodized black (per manufacturer specs)
Weight	Approx. 8.5 lbs (unloaded, per HK specs)
Condition	New

Key Features

• 13-inch Cold-Hammer-Forged Barrel — Why it matters: The medium-contour profile balances weight and rigidity, so you get sub-MOA accuracy potential without the bulk of a 16-inch barrel. That extra 3 inches over a typical pistol barrel means higher velocities and better terminal performance with 7.62x51mm.
• Short-Stroke Gas Piston System — Why it matters: Unlike direct-impingement ARs, the piston keeps carbon and fouling out of the receiver. You run cleaner, cooler, and more reliably—especially critical when you add a suppressor and shoot high volumes.
• Ambidextrous Controls — Why it matters: The bolt release, safety selector, and charging handle are all mirrored for lefties. No swapping parts or adapting your grip—just grab and shoot from either shoulder.
• M-LOK Free-Float Handguard — Why it matters: You mount lights, lasers, or grips directly to the handguard without touching the barrel. Zero shift stays consistent, and the slim profile feels natural in your support hand.
• Suppressor-Ready Threaded Muzzle — Why it matters: The 5/8×24 threads let you attach a brake or suppressor in seconds. HK designed the gas system to cycle with or without a can, so you don’t need an adjustable gas block for most setups.

Who It’s For

This pistol is built for the EDC enthusiast who wants a truck gun, a ranch rifle substitute, or a compact precision rig for steel matches. If you already carry a full-size 9mm but need something that reaches out to 600 yards with authority, the MR762 A4 is your answer. It’s also ideal for shooters who run suppressed and want a dedicated host that doesn’t choke on carbon.

Pros & Cons

• Pros: HK reliability, match-grade barrel out of the box, ambi controls, runs suppressed without tuning, M-LOK handguard for gear, 20-round mag included.
• Cons: Price point is steep—around $4,479—and the pistol-length gas system can be snappy with full-power 7.62 loads. Also, finding holsters or EDC bags that fit a 13-inch barrel is tougher than for a 10.5-inch AR pistol.

Comparison

Feature	H&K MR762 A4 Pistol	Geissele Super Duty Pistol 7.62	Lone Wolf Distributors G9 7.62×39
Caliber	7.62x51mm	7.62x51mm	7.62x39mm
Barrel Length	13 in	11.5 in	10.5 in
Gas System	Short-stroke piston	Direct impingement	Direct impingement
MSRP	$4,479	$2,499	$1,299
Suppressor Ready	Yes (factory tuned)	Yes (adjustable gas block)	Yes (adjustable gas block)

The Geissele is a solid DI gun for the money, but the HK’s piston system gives you cleaner operation and less maintenance. The Lone Wolf is cheaper but uses a different cartridge—7.62×39 is cheaper to feed but doesn’t match the ballistic performance of 7.62x51mm at distance.

FAQ

Does the H&K MR762 A4 Pistol come with a brace?

No, it ships as a bare pistol with a buffer tube and no brace. You’ll need to add your own arm brace or SBR it if you want a stock. Check your local laws before modifying.

Can I use standard AR-10 magazines in this pistol?

No—the MR762 uses HK-specific polymer magazines that are proprietary. It comes with one 20-round magazine, and spares are available from HK or aftermarket sources like Magpul (LR/SR pattern).

Is the barrel compatible with a suppressor?

Yes. The 13-inch barrel is threaded 5/8×24 and the gas system is designed to cycle with a suppressor attached. No adjustable gas block needed for most cans, though you may want one for tuning subsonic loads.

What is the warranty on the H&K MR762 A4 Pistol?

HK offers a limited lifetime warranty to the original owner. It covers defects in materials and workmanship, but not wear items like barrels or springs.

✅ Nationwide delivery (all 50 states) ✅ Ships 1-2 business days ✅ 30-day returns ✅ Secure checkout

Last updated: April 2026

AR Pistols | HK Parts & Accessories | 7.62×51 Ammo