Heckler & Koch MR556 A4 Piston M-LOK .223 Remington 5.56 NATO Blue/Black Pistol
Capacity: 30+1 · Barrel Length: 11 inches
Specifications
Grip HK USA enhanced polymer grip
Action Semi-Automatic
Finish Blue/Black
Weight 6.9 pounds
Capacity 30+1
Grip Safety No
Optic Ready Yes
Barrel Length 11 inches
Manual Safety Yes
Overall Length 29.5 inches
Trigger Safety No
Caliber / Gauge .223 Remington, 5.56 NATO
Threaded Barrel Yes
Magazines Included 1
Ambidextrous Safety Yes
WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to WWW.P65WARNINGS.CA.GOV
Description
Product Overview
The Heckler & Koch MR556 A4 pistol is the commercial semi-automatic counterpart to the HK416, combining HK's short-stroke gas piston operating system with a compact 11-inch barrel. The piston system limits hot carbon fouling in the action, helping reduce maintenance and wear during extended use. An adjustable gas regulator supports tuning for suppressed or unsuppressed operation, while the free-float M-LOK handguard provides a slim, adaptable mounting platform. Fully ambidextrous controls and an HK USA enhanced grip improve handling for a wide range of users. Chambered for .223 Remington and 5.56 NATO, the MR556 A4 accepts a 30-round magazine and includes one magazine.
Key Features
- Short-stroke gas piston system helps keep hot carbon fouling out of the action
- Adjustable gas regulator supports suppressed and unsuppressed operation
- 11-inch threaded barrel chambered for .223 Remington and 5.56 NATO
- Free-float M-LOK handguard provides flexible accessory mounting
- Fully ambidextrous controls support left- and right-handed operation
- Optic-ready top rail accommodates a wide range of aiming systems
The HK MR556 A4 delivers compact piston-driven performance with ambidextrous controls and adaptable M-LOK compatibility.
5.0 | 1 Reviews
Free and Fast Shipping to the Lower 48 States.
- SKU:
- 81001050
- UPC:
- 642230269439
- BUDS ID:
- 172735
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Customer Reviews
5.0 out of 5
1 total reviews
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Latest Reviews
Michael C.
8 months ago
Verified Purchaser
One of the best AR15...
One of the best AR15 style rifles ever made. Way lighter than the previous MR556 A1 variant. Handguard is way better, and doesn't require tool to take out pins for lower receiver. Perfectly gassed, way smoother shooting both suppressed and unsuppressed. Capable of 1 MOA or better with right ammunition. Expensive, but well worth the money. Shoots better than my mk18, and runs cleaner and cooler.
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Retail Availability
Bud's Gun Shop - Lexington, KY
1105 Industry Road, Lexington, KY 40505
Bud's Gun Shop - Sevierville, TN
2270 Two Rivers Blvd, Sevierville, TN 37876
Uncle Lee's - Greenville, KY
820 Main St, Greenville, KY 42345
