HK MR556 A1 Competition 5.56mm NATO 16.5in Black Semi-Automatic Modern Sporting Rifle – 10+1 Rounds

The HK MR556 A1 Competition 5.56mm NATO 16.5in is a civilian AR-style rifle designed for shooters seeking match-grade performance, competitive shooting capability, and tactical reliability. Engineered as a direct descendant of the legendary HK416, the MR556A1 Competition delivers military-grade features in a semi-automatic platform, perfect for precision target shooting, tactical drills, and home defense.

Cold Hammer Forged Barrel & Precision Engineering

This rifle features a 16.5-inch cold hammer-forged barrel crafted from high-grade steel, providing exceptional accuracy and long-term durability. The barrel is engineered for consistency, tighter groupings, and enhanced bullet velocity, making the MR556A1 Competition ideal for competitive 3-gun, precision AR training, and long-range target practice.

Reliable Gas Piston Operating System

The MR556A1 uses HK’s proprietary piston operating system with a solid operating “pusher” rod, virtually eliminating malfunctions common in direct impingement rifles. Shooters experience smoother cycling, reduced fouling, and longer component life, making this rifle perfect for extended practice sessions and high-volume range shooting.

Modular Design & Optics Ready HK MR556 A1 Competition 5.56mm NATO 16.5in

Featuring a top-mounted Picatinny rail, the MR556A1 Competition is fully optics-ready for scopes, red dots, or tactical sights. Its major subassemblies, including the upper receiver/barrel assembly, are fully interchangeable with other high-quality AR-style rifles, allowing you to retrofit legacy AR systems with the MR556A1 components for a modern upgrade.

Enhanced Competition Features

• Magpul CTR 6-position adjustable buttstock for ergonomic shooting and rapid target transitions
• Two-stage match trigger for precise control and smoother pull
• Ambidextrous safety selector for left- and right-handed shooters
• Compensator muzzle for reduced recoil and improved follow-up shot accuracy
• Supplied with one 10-round magazine for range use or compliance with local laws
• Optics-ready Picatinny rail for mounting red dot sights or scopes
• 1:7 twist barrel optimized for all standard 5.56mm NATO ammunition

Specifications

Why Choose the HK MR556A1 Competition Rifle?

The HK MR556A1 Competition is designed for shooters who demand precision, reliability, and tactical versatility. Ideal for competitive 3-gun matches, high-volume training, and AR-style tactical drills, this rifle combines the legendary HK engineering of the MR556 series with features tailored for competition shooting. Fully optics-ready, with an ambidextrous safety and adjustable stock, the MR556A1 Competition offers unmatched control, durability, and performance for serious civilian shooters.