HK MR762 A4 7.62X51 13″ 20RD SBR
About this product
HK MR762 A4 7.62X51 13” 20RD SBR
The HK MR762 A4 7.62x51 13” 20RD SBR is the evolution of a proven platform, built to run harder and longer without giving up accuracy or reliability. This short-barreled rifle uses HK’s short stroke gas piston system to keep hot carbon fouling out of the action, so you get cleaner operation and less wear on internal parts. The adjustable gas regulator lets you fine-tune the action for suppressed or unsuppressed use. Per HK specs, this rifle is reinforced and enhanced at every critical point, making it the ultimate choice for those who demand a rifle that just works.
| Manufacturer | Heckler & Koch |
|---|---|
| Model | MR762 A4 SBR |
| Material | Reinforced steel and aluminum alloy (per manufacturer specs) |
| Compatibility | 7.62x51mm NATO / .308 Winchester |
| Finish | Hardcoat anodized black |
| Weight | Approx. 7.9 lbs (per manufacturer specs) |
| Condition | New |
Key Features
- Short stroke gas piston system — Why it matters: This design keeps carbon and debris out of the receiver, so you can shoot longer between cleanings and reduce wear on bolts and carriers.
- Adjustable gas regulator — Why it matters: Dial in the gas setting for suppressed or unsuppressed fire without changing parts, ensuring reliable cycling no matter the setup.
- 13-inch cold hammer-forged barrel — Why it matters: Shorter length means better maneuverability in tight spaces, while the hammer-forged construction delivers consistent accuracy round after round.
- Reinforced receiver and bolt carrier — Why it matters: HK added extra material at stress points to handle the higher pressures of 7.62x51, giving you a rifle that holds up to hard use.
- 20-round steel magazine — Why it matters: Magpul-style capacity with a durable steel body that feeds reliably even in adverse conditions.
Who It’s For
This rifle is built for shooters who need a compact, hard-hitting platform that can take abuse and keep running. It’s ideal for law enforcement, military operators, or serious civilian shooters who train regularly and demand the best. If you’re looking for a reliable short-barreled rifle in 7.62x51 that doesn’t sacrifice accuracy for size, the MR762 A4 SBR is your answer.
Pros & Cons
- Pro: Extremely reliable piston system that runs cleaner than DI guns.
- Pro: Adjustable gas regulator for suppressor use without swapping parts.
- Pro: HK build quality and durability that outlasts most competitors.
- Con: Price is high at $4,704.16, making it a serious investment for most shooters.
- Con: Limited aftermarket support compared to AR-10 pattern rifles.
Comparison vs. Competitors
| Feature | HK MR762 A4 SBR | Geissele Super Duty 7.62 | Lone Wolf Distributors LWD-10 |
|---|---|---|---|
| Operating System | Short stroke gas piston | Direct impingement | Direct impingement |
| Barrel Length | 13 inches | 14.5 inches | 16 inches |
| Weight | 7.9 lbs | 8.2 lbs | 7.5 lbs |
| Gas Adjustment | Adjustable regulator | Fixed | Fixed |
| Price | $4,704.16 | $2,499.00 | $1,299.00 |
The HK MR762 A4 SBR stands out with its piston system and adjustable gas block, making it a better choice for suppressed use than the Geissele or Lone Wolf options. However, those competitors cost significantly less and have more aftermarket parts available.
FAQ
What caliber does the HK MR762 A4 SBR use?
This rifle is chambered in 7.62x51mm NATO and also accepts .308 Winchester ammunition. It feeds reliably from the included 20-round steel magazine.
Can I use this rifle with a suppressor?
Yes, the adjustable gas regulator lets you tune the action for suppressed use. Just turn the regulator to the appropriate setting and your rifle will cycle reliably with a can attached.
Is the barrel threaded for a muzzle device?
Yes, the 13-inch barrel comes with standard 5/8x24 threads, so you can attach most .30 caliber muzzle brakes, flash hiders, or suppressors directly.
How does the piston system help reliability?
The short stroke piston keeps hot carbon and fouling out of the receiver and bolt carrier group. This means the rifle runs cleaner, requires less maintenance, and experiences less wear over time compared to direct impingement designs.
What is the warranty on this rifle?
HK offers a limited lifetime warranty to the original owner. Contact HK directly for full terms and coverage details.
Ready to Order
This HK MR762 A4 7.62x51 13” 20RD SBR is in stock and ready to ship. It’s a top-tier short-barreled rifle for shooters who need uncompromising performance. Order now and get it delivered to your door.
- ✓ Nationwide delivery (all 50 states)
- ✓ Ships 1-2 business days
- ✓ 30-day returns
- ✓ Secure checkout
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Last updated: April 2026