HK MR556A4 16.5″ 5.56 NATO Rifle, Black

The latest update from HK-USA to the commercial variant of the legendary HK416, the MR556 A4, and MR762 A4 represent an enhanced example of “no compromise” HK performance.

Its short-stroke gas piston operating system does not impart hot carbon fouling back into the action, allowing the weapon to run longer, with less maintenance and with less wear on internal components than direct-impingement ARs. Its adjustable gas regulator allows the operator to tune the action specifically for suppressed or unsuppressed operation. Fully ambidextrous controls, lighter weight, and a slimmer profile make the new A4 easier to operate, manipulate, and employ.

For those who demand an AR with unmatched capability and uncompromising reliability and durability, the MR A4s remain the top-tier solution.

HK MR556 A4 – Precision Redefined | Heckler & Koch USA

The HK MR556 A4 represents the pinnacle of precision engineering and tactical performance. Designed for uncompromising accuracy, durability, and reliability, this semi-automatic rifle is a civilian variation of the legendary HK416, trusted by military forces worldwide. With a cold hammer-forged barrel, a gas piston system for cleaner operation, and enhanced modularity, the MR556 A4 is built to exceed expectations in any environment.

Whether you’re a competition shooter or a firearm enthusiast, the HK MR556 A4 delivers unparalleled performance and adaptability. Explore advanced features such as the free-floating rail system, ambidextrous controls, and compatibility with a wide range of accessories.

Key Features:

• Cold Hammer-Forged Barrel: Ensures long-lasting accuracy and precision.
• Gas Piston System: Cleaner and more reliable operation compared to direct impingement systems.
• Enhanced Modularity: Customizable rail system for attaching optics, grips, and other accessories.
• Durable Build: Engineered with premium materials for rugged performance.
• Proven Design: Based on the HK416, renowned for its battlefield reliability.

Experience the HK MR556 A4, a rifle that embodies Heckler & Koch’s commitment to quality and innovation.