The HK MR556A1 can fire 5.56 NATO and .223 easily, and offers a very smooth and accurate shooting experience. The short-stroke gas piston system is simple and performs reliably whether unsuppressed or suppressed.

The MR223 is a semi-automatic rifle in calibre .223 Remington. It is the civilian version of the HK416, which is in service with numerous regular and specialised forces of the military as well as t... The MR223 is available in 11, 14.5 and 16.5 inch barrel lengths.

Like the HK416, the MR556A1 uses a proprietary HK short-stroke gas piston in place of the direct-gas-impingement system found on lesser AR15-style rifles that propels exhaust gas into the upper receiver to operate the action.

Like the HK416, the MR556A1 is a major product improvement over conventional AR-type carbines and rifles. The MR556A1 uses the HK proprietary gas piston operating system, employing a piston and a solid operating pusher rod in place of the gas tube normally found in AR15/M16/M4-style firearms.

H&K MR 556 A1 rifle chambered in 5.56MM used but in great condition. Flat top rail handguard and receiver with m lock style cut outs in handguard. Includes the original soft carry bag.

The MR556A1 rifle includes a 10 or 30 round steel magazine, set of Troy Industries Micro mechanical sights, HK multi-tool, lock, and case. Features: Equipped with rugged, adjustable TROY micro sights

Nov 18, 2024 · The 5.56 NATO/.223 Remington caliber offers a versatile balance of power, accuracy, and versatility for both target shooting and hunting. The 16.5-inch barrel provides a good balance between maneuverability and accuracy, while the 30-round magazine capacity ensures ample ammunition for extended range sessions or defensive scenarios.

HK MR556 A1 5.56/.223, 16.5" Medium Contour Barrel, M-LOK, Black, 30rd. HK Heckler and Koch 81000579. The MR556A1 is a direct descendant of the world-famous HK416. It offers the civilian semi-automatic shooter battlefield-proven reliability, durability and precision you would expect from Heckler ...

Make: Heckler & Koch HK. Model: MR556A1. Serial Number: 241-406914. Year of Manufacture: 2023 CD date code. Caliber: 5.56, .223. Action Type: Semi-Automatic, Proprietary Gas Piston driven, fed by detachable AR15 pattern magazines.