The Heckler & Koch MR556 A4 represents a definitive pinnacle of modern firearms engineering, scaling down HK’s legendary battle rifle DNA into a highly maneuverable AR pistol platform. Operating on a proprietary short-stroke gas piston system, the MR556 A4 virtually eliminates carbon fouling and gas blowback into the receiver, drastically increasing operational reliability and extending parts life. This premium firearm features a cold hammer-forged 11.00″ barrel designed for exceptional mechanical accuracy and thermal performance. Fully ambidextrous controls, a slim M-LOK compatible handguard, and an optimized receiver profile ensure rapid handling and seamless ergonomics. Finished in a striking Patriot Brown, the MR556 A4 offers an uncompromising choice for collectors, tactical enthusiasts, and defensive shooters alike.
- Manufacturer: Heckler & Koch (HK)
- Model: MR556 A4
- Caliber: 5.56x45mm NATO
- Action: Semi-Automatic (Short-Stroke Gas Piston)
- Capacity: 30 Rounds
- Barrel Length: 11.00″
- Finish Color: Patriot Brown
- Grips: Black Polymer
- Sights: Optics-Ready (Full-Length Picatinny Top Rail)
- Safety: Ambidextrous Safety Lever
- Overall Length: 26.50″
- Weight: 6.61 lbs
- Unique Features: Piston-driven design, ambidextrous controls, enhanced duty triggers
- What’s In The Box: AR Pistol, (1) 30-Round Magazine, Owner’s Manual
