HK MR556A1 Competition .223 Remington/5.56 NATO Rifle

Description

Product Overview

The HK MR556A1 Competition is a semi-automatic rifle chambered for .223 Remington and 5.56 NATO, configured for practical competition and demanding range use. Its HK-designed short-stroke gas piston system keeps propellant gases and carbon fouling out of the receiver, promoting reliable operation with less routine maintenance than traditional direct-impingement designs. A cold hammer forged 16.5-inch barrel is paired with a 14-inch free-floating Modular Rail System, allowing shooters to position accessory rail sections where needed while maintaining a comfortable handguard profile. The competition configuration also includes an OSS compensator, extended magazine release, and Magpul CTR adjustable stock. The rifle accepts standard AR-pattern magazines and includes a manual safety selector, factory sights, and an optics-ready top rail.

Key Features

• Cold hammer forged 16.5-inch barrel provides long service life and consistent accuracy
• Short-stroke gas piston system reduces fouling and simplifies maintenance
• 14-inch free-floating Modular Rail System supports flexible accessory placement without adding unnecessary weight
• OSS compensator helps manage muzzle movement during rapid fire
• Magpul CTR adjustable stock provides a secure, customizable length of pull
• Extended magazine release enables faster magazine changes during competition use

Explore the HK MR556A1 Competition for a reliable, competition-ready rifle built around HK piston-driven performance.