HK MR556 A4 .223 Remington 5.56 NATO Gray Cerakote Rifle

Description

Product Overview

The HK MR556 A4 is a semi-automatic rifle built around an HK416-style upper receiver and short-stroke gas piston operating system. Its 16.5-inch, 1-in-7-inch-twist barrel is threaded 1/2x28 and chambered for both .223 Remington and 5.56 NATO. A fully ambidextrous lower receiver, ambidextrous safety lever, collapsible and folding stock, HK416 Slimline furniture, and M-LOK handguard provide adaptable handling and accessory compatibility. The rifle includes one 30-round magazine and is supplied without sights, allowing the user to configure the top rail with a preferred optic or aiming system.

Key Features

• Short-stroke gas piston system offers reliable semi-automatic operation
• 16.5-inch barrel with a 1-in-7-inch twist rate supports a broad range of bullet weights
• 1/2x28 threaded muzzle accommodates compatible muzzle devices and suppressors
• Fully ambidextrous lower receiver and ambidextrous safety lever support left- and right-handed operation
• Collapsible and folding stock adjusts the rifle from 33.25 to 36.5 inches
• M-LOK handguard provides flexible accessory mounting options

The HK MR556 A4 combines HK416-derived performance with ambidextrous controls and a configurable, optic-ready layout.