Heckler & Koch MR556 A4 5.56x45mm 11" Patriot Brown 10+1 81001202

Heckler & Koch MR556 A4

The Heckler & Koch MR556 A4 is a premium semi-automatic tactical pistol chambered in 5.56x45mm NATO, built to military specifications for elite performance in compact form. This model features an 11-inch cold hammer-forged threaded barrel with 1:7 twist for exceptional accuracy and a short-stroke gas piston system that runs cleaner and cooler than direct impingement. The Patriot Brown finish on the aluminum receiver and M-LOK handguard provides durable corrosion resistance with tactical aesthetics.

Advanced features include fully ambidextrous controls—safety selector, magazine release, and charging handle—for seamless operation by all shooters. The 6-position adjustable synthetic stock ensures custom fit, while the full-length Picatinny rail supports optics and accessories. A smooth 4.5–5.6 lb trigger delivers crisp breaks for precise shooting, and the 10+1 capacity with included magazine offers compliant firepower.

This pistol suits home defense, tactical training, or competitive use where reliability under stress is paramount. Its gas piston design minimizes fouling for extended sessions, making it ideal for professionals demanding battlefield-proven durability in a state-compliant package.

Specifications