HK MR556 A4 11-inch Threaded Barrel 5.56 NATO Black Pistol
Capacity: 30+1 · Barrel Length: 11 inches
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Specifications
Action Semi-Automatic
Ambidextrous Safety Yes
Barrel Length 11 inches
Caliber / Gauge 5.56 NATO, .223 Remington
Capacity 30+1
Finish Black
Grip Polymer
Grip Safety No
Magazines Included 1
Manual Safety Yes
Optic Ready Yes
Overall Length 28.5 inches
Sights Standard Sights
Threaded Barrel Yes
Trigger Safety No
Weight 7.3 pounds
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 is an AR-style pistol built around HK’s short-stroke gas piston operating system. By keeping hot carbon fouling out of the action, the system supports extended operation with reduced maintenance and less wear on internal components. Its adjustable gas regulator allows tuning for suppressed or unsuppressed use, while fully ambidextrous controls provide convenient operation from either side. The 11-inch threaded barrel offers a compact handling profile and supports compatible muzzle devices and suppressors.
Key Features
- Short-stroke gas piston system helps reduce fouling and maintenance inside the action
- Adjustable gas regulator supports suppressed and unsuppressed operation
- 11-inch threaded barrel accepts compatible muzzle devices and suppressors
- Fully ambidextrous controls support left- and right-handed operation
- Chambered for 5.56 NATO and compatible with .223 Remington ammunition
- Includes one 30-round magazine
The MR556 A4 combines HK piston-driven reliability, adaptable gas regulation, and ambidextrous controls in a compact AR pistol configuration.
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- SKU:
- 81001201
- UPC:
- 642230271050
- BUDS ID:
- 180687
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Retail Availability
Bud's Gun Shop - Lexington, KY
1105 Industry Road, Lexington, KY 40505
Bud's Gun Shop - Sevierville, TN
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| Action | Semi-Automatic | Semi-Automatic | Semi-Automatic | Semi-Automatic | Semi-Automatic |
| Barrel Length (in.) | 11.0 | 11.0 | 10.5 | 10.5 | 11.0 |
| Caliber / Gauge | 5.56 NATO, .223 Remington | 5.56 NATO | 5.56 NATO, .223 Wylde | 5.56 NATO, .223 Remington | 5.56 NATO, .223 Remington |
| Capacity | 30 | 30 | 30 | 30 | 30 |
| Finish | Black | Black | Flat Dark Earth | Black Armor Cerakote | Blue/Black |
| Manual Safety | Yes | Yes | Yes | Yes | Yes |
| Optic Ready | Yes | Yes | Yes | Yes | Yes |
| Threaded Barrel | Yes | Yes | Yes | Yes | Yes |
| Ambidextrous Safety | Yes | Yes | Yes | N/A | Yes |
| Weight (lbs) | 7.3 | N/A | 6.9 | 6.0 | 6.9 |
| Overall Length (in.) | 28.5 | N/A | N/A | 27.3 | 29.5 |
| Sights | Standard Sights | Standard Sights | Standard Sights | N/A | N/A |
| Trigger Safety | No | Yes | No | N/A | No |
| Actions | Current Item |
