HK MR556 A4 11-Inch 5.56 NATO Rifle

Description

Product Overview

The HK MR556 A4 11-inch SBR is the commercial counterpart to the HK416, built around HK’s short-stroke gas piston operating system. The piston design keeps hot propellant gases and carbon fouling out of the receiver, helping reduce internal wear and maintenance compared with traditional direct-impingement systems. An adjustable gas regulator lets the shooter tune the rifle for suppressed or unsuppressed use. The compact 11-inch barrel, slimmer handguard profile, lighter configuration, and fully ambidextrous controls make the MR556 A4 well suited to close-quarters handling while retaining the durability and reliability expected from HK. The threaded barrel and optic-ready upper receiver support a broad range of accessories. This short-barreled rifle is regulated under the National Firearms Act.

Key Features

• Short-stroke gas piston system reduces carbon fouling in the action and helps extend service intervals
• Adjustable gas regulator supports suppressed and unsuppressed operation
• Cold hammer-forged 11-inch barrel is threaded 1/2x28 for compatible muzzle devices and suppressors
• Fully ambidextrous controls improve handling for right- and left-handed shooters
• Integrated Picatinny top rail provides a secure platform for mounting optics
• Includes one 30-round magazine and is regulated as an NFA item

The HK MR556 A4 11-inch SBR delivers piston-driven reliability and ambidextrous control for demanding users. Purchase in accordance with all applicable NFA requirements.