The HK MR556A1 delivers military-grade precision in a California-compliant configuration, engineered with the same specifications as the HK416 used by elite military units worldwide. This semi-automatic rifle combines German engineering excellence with tactical versatility for serious shooters demanding uncompromising performance.
What Makes This Different
Built on HK's proven HK416 platform, the MR556A1 features a cold hammer-forged barrel and proprietary gas piston operating system that runs significantly cooler and cleaner than direct impingement designs. The free-floating barrel delivers sub-MOA accuracy potential while the piston system reduces fouling by 90% compared to traditional AR-pattern rifles. This California-compliant model includes fixed stock and 10-round magazine capacity to meet state regulations without sacrificing operational reliability.Key Features
- Cold hammer-forged 16.5-inch barrel with 1:7 twist rate for optimal 5.56 NATO performance
- HK proprietary short-stroke gas piston system eliminates gas blowback to the receiver
- M-LOK compatible handguard with multiple attachment points for accessories
- Ambidextrous controls including bolt catch, magazine release, and safety selector
- Free-floating barrel system enhances accuracy and reduces point-of-impact shift
- California-compliant fixed stock configuration with 10-round magazine capacity
- HK's signature fluted chamber for reliable extraction under adverse conditions
Technical Specs
- Caliber: 5.56x45mm NATO/.223 Remington
- Barrel Length: 16.5 inches with 1:7 twist rate
- Overall Length: 33-39 inches (depending on stock position)
- Weight: 8.9 pounds unloaded
- Magazine Capacity: 10 rounds (California compliant)
- Operating System: Short-stroke gas piston
- Handguard: M-LOK compatible aluminum
- Finish: HK proprietary coating system
- Country of Origin: Germany
