HK MR556A1 M-LOK 5.56 NATO Rifle

Description

Product Overview

The HK MR556A1 M-LOK is a semi-automatic rifle derived from the HK416 and built around Heckler & Koch's short-stroke gas-piston operating system. Its closed piston system keeps propellant gases out of the receiver, helping the rifle run cleaner and cooler in demanding conditions. The 16.5-inch cold hammer-forged, cannon-grade steel barrel features a 1:7 twist and taper-bore profile for consistent accuracy and long service life. A six-position adjustable stock, M-LOK handguard, ambidextrous controls, continuous top rail, and threaded muzzle provide a flexible configuration for training, duty, and recreational shooting.

Key Features

• HK short-stroke gas-piston system keeps the receiver cleaner and reduces heat during operation.
• 16.5-inch cold hammer-forged barrel with a 1:7 twist supports durable, consistent performance.
• M-LOK handguard and continuous top rail provide flexible accessory and optic mounting.
• Six-position synthetic adjustable stock accommodates different users and shooting positions.
• Ambidextrous manual safety and controls support left- and right-handed operation.
• Includes one 30-round magazine and features a threaded muzzle for compatible accessories.

The HK MR556A1 M-LOK combines HK416-derived operating components with a durable, configurable rifle platform for serious range and field use.