HK MR556 A4 PISTOL 11″ 5.56 NATO 30RD | GRAY
HK MR556 A4 PISTOL 11″ 5.56 NATO with short-stroke gas piston system, HK416 upper receiver, ambidextrous controls, and gray Cerakote finish.
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Description
HK MR556 A4 PISTOL Features
The HK MR556 A4 PISTOL is a compact, piston-driven 5.56 NATO platform derived from the combat-proven HK416 system. Designed to deliver the reliability and durability associated with Heckler & Koch’s military rifles, this pistol configuration provides a compact footprint while retaining the robust operating system that made the HK416 widely respected. The short-stroke gas piston system helps reduce fouling and heat transfer into the receiver, improving long-term reliability during extended firing sessions.
Built around an 11-inch barrel and HK416-style upper receiver, the platform balances compact handling with the ballistic performance expected from a 5.56 NATO firearm. The fully ambidextrous lower receiver provides intuitive control access for both right- and left-handed shooters, including the ambidextrous safety lever and magazine controls. A free-floating M-LOK handguard offers flexible mounting options for lights, grips, and other accessories while maintaining a streamlined profile. The gray Cerakote finish provides corrosion resistance and a distinctive appearance while protecting the metal surfaces from wear.
The MR556 A4 pistol configuration incorporates HK’s enhanced ergonomic pistol grip and a threaded barrel that allows compatibility with muzzle devices or suppressor-ready setups. Combined with the piston operating system and robust construction, this platform delivers the handling characteristics of a compact AR-style firearm with the engineering refinements associated with Heckler & Koch designs.
Specifications
Manufacturer: Heckler & Koch (HK USA)
Model: MR556 A4 Pistol
Operating System: Short-Stroke Gas Piston
Receiver Type: Fully Ambidextrous Lower Receiver
Upper Receiver: HK416 Pattern Upper
Barrel Type: Threaded Barrel
Twist Rate: 1:7
Handguard: Free-Floating M-LOK Handguard
Grip: HK Enhanced Ergonomic Grip
Safety: Ambidextrous Safety Lever
Additional Notable Specs: Gray Cerakote finish with piston-driven operating system
Specifications
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