Heckler & Koch MR556 A1 Competition Rifle 5.56 NATO 16.5" (CR556-A1, Factory Package)

The Heckler & Koch MR556 A1 Competition Rifle represents the civilian evolution of HK’s legendary piston-driven platform, engineered for shooters who demand reliability, precision, and premium build quality. Built around HK’s proprietary short-stroke gas piston system, the MR556 runs cleaner and cooler than traditional direct impingement systems, making it an ideal choice for high-volume shooting and demanding environments.

This Competition model features an extended free-float handguard, providing ample rail space for accessories while maintaining excellent barrel harmonics for improved accuracy. The 16.5" barrel is paired with a factory compensator that helps reduce muzzle rise and keeps follow-up shots fast and controlled. Fully ambidextrous controls and a robust aluminum receiver round out a rifle that is equally suited for range work, training, or professional applications.

This example appears to be a complete factory package, including the original HK soft case, manual, tools, and a factory magazine. Known for their durability and German engineering pedigree, MR556 rifles continue to hold strong value in the market and are highly sought after by enthusiasts looking for a premium AR-platform rifle.

Specs Table