Heckler & Koch MR556 A4 Tactical 5.56 NATO Black Rifle
Caliber: 5.56 NATO · Capacity: 30+1
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Specifications
Action Semi-Automatic
Ambidextrous Safety Yes
Barrel Length 16.5 inches
Caliber / Gauge 5.56 NATO
Capacity 30+1
Finish Blue/Black
Grip Safety No
Manual Safety Yes
Optic Ready Yes
Overall Length 32.5 inches
Threaded Barrel Yes
Trigger Safety No
Weight 8.6 pounds
Description
Product Overview
The Heckler & Koch MR556 A4 is a semi-automatic rifle built around the commercial version of the HK416 operating system. Its short-stroke gas piston system keeps hot carbon fouling out of the action, supporting cleaner operation and reduced maintenance. A two-position adjustable gas regulator allows the rifle to be configured for suppressed or unsuppressed use. The match-grade cold-hammer-forged barrel is suppressor-ready with 1/2x28 muzzle threads, while the continuous Picatinny rail and M-LOK handguard provide a flexible platform for optics, lights, and other accessories. Fully ambidextrous controls, including the 45-degree safety selector, bolt release, and magazine release, improve handling for right- and left-handed shooters.
Key Features
- Short-stroke gas piston system helps keep the action cleaner than direct-impingement designs
- Two-position adjustable gas regulator supports suppressed and unsuppressed operation
- 16.5-inch match-grade cold-hammer-forged barrel with suppressor-ready 1/2x28 threads
- Continuous Picatinny rail and M-LOK handguard support optics and accessories
- Fully ambidextrous safety, bolt release, magazine release, and QD controls
- 30+1 capacity provides substantial ammunition capacity for training and field use
The MR556 A4 combines HK416-derived piston reliability, ambidextrous controls, and a versatile accessory-ready design in a durable 5.56 NATO rifle.
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
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- SKU:
- 81000827
- UPC:
- 642230269408
- BUDS ID:
- 172733
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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
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| Action | Semi-Automatic | Semi-Automatic | Semi-Automatic | Semi-Automatic | Semi-Automatic |
| Ambidextrous Safety | Yes | Yes | Yes | Yes | Yes |
| Barrel Length (in.) | 16.5 | 16.1 | 16.1 | 16.0 | 16.0 |
| Caliber / Gauge | 5.56 NATO | 5.56 NATO | 5.56 NATO, .223 Remington | 5.56 NATO, .223 Remington | 5.56 NATO, .223 Remington |
| Capacity | 30 | 30 | 30 | 30 | 30 |
| Finish | Blue/Black | Black | Target Gray | Blue/Black | Blue/Black |
| Manual Safety | Yes | Yes | Yes | Yes | Yes |
| Optic Ready | Yes | Yes | Yes | Yes | Yes |
| Overall Length (in.) | 32.5 | 32.5 | 32.5 | 35.5 | 34.1 |
| Threaded Barrel | Yes | Yes | Yes | Yes | Yes |
| Weight (lbs) | 8.6 | 7.3 | 7.3 | 7.9 | 7.8 |
| Sights | N/A | Standard Sights | Standard Sights | Standard Sights | Standard Sights |
| Trigger Safety | No | N/A | No | No | Yes |
| Actions | Current Item |
