# The HK MR556A1: Precision and Reliability in a Civilian-Ready Package Experience the legacy of the renowned HK416 in the semi-automatic configuration designed exclusively for civilian use - the HK MR556A1. Boasting match rifle capabilities, this rifle is equipped with HK's proprietary gas piston operating system, ensuring unparalleled reliability by eliminating common malfunctions found in direct impingement gas systems. The innovative HK Modular Rail System (MRS) offers a truly free-floating design, enhancing accuracy, and featuring an ergonomic yet familiar handguard inspired by the previous FFRS. The MR556A1's upper receiver includes a Picatinny rail for optics and mechanical sights, while major subassemblies are fully interchangeable with other high-quality AR-style firearms. Proudly manufactured in the USA using a combination of American and German-made components, the German-produced unchromed barrel, crafted through HK's renowned cold hammer forging process, guarantees superior accuracy and extended service life. Elevate your shooting experience with the precision and craftsmanship of the HK MR556A1. --- ## Product Details - Action: Semi-Auto - Caliber: 5.56x45mm NATO - Barrel Length: 16.50" - Capacity: 30+1 - Oal: 33.90"- 37.68" - Weight: 8.60 lbs - Stock Description: Adjustable - Receiver Material: Aluminum - Sights: Optic Ready - Barrel Description: Medium Contour - Twist: 1:7" - Barrel Length Range: 16" to 16.99" - Weight Range: 8 lbs to 8.99 lbs - Hand: Right - Stock Finish Group: Black - Metal Finish Group: Blued/Black