Heckler & Koch MR556 A4 SBR 11" Piston Rifle

The Heckler & Koch MR556 A4 SBR: Uncompromising Performance in a Compact Platform

The MR556 A4 SBR represents Heckler & Koch's commitment to bringing proven military-grade engineering to the civilian market. This short-barreled rifle is the commercial variant of the legendary HK416, refined and enhanced for operators who refuse to accept compromise.

Superior Operating System

At the heart of this rifle lies Heckler & Koch's renowned short-stroke gas piston system. Unlike direct-impingement designs that route hot carbon back into the action, the piston system keeps your rifle cleaner and running longer between maintenance cycles. You'll experience less wear on internal components and a more reliable platform over extended use.

Operator-Centric Design

• Adjustable Gas Regulator: Tune the action for suppressed or unsuppressed operation
• Fully Ambidextrous Controls: Operate the rifle naturally from either shoulder
• Lightweight Profile: The slimmer design reduces fatigue during extended handling
• Proven Reliability: Built on the foundation of military-tested HK416 engineering

Important Legal Notice

This is a National Firearms Act (NFA) regulated item. Short-barreled rifles require proper federal registration and compliance with all applicable state and local laws. It is your responsibility to ensure full compliance before purchase. Consult an attorney if you have questions about NFA regulations in your jurisdiction.

For those who demand top-tier capability and unmatched durability, the MR556 A4 SBR stands alone.