Up for sale is a New Open Bag premium Heckler & Koch MR556 A4, one of the most sought-after civilian rifles inspired by the legendary HK416 platform. Chambered in .223 Remington / 5.56 NATO, this rifle features a 16.5" barrel, durable black anodized finish, and a free-float M-LOK handguard for maximum accuracy and customization. Built with HK’s renowned engineering, it includes an adjustable gas block, ambidextrous controls, HK USA enhanced grip, and the factory HK416 six-position stock.
This package comes nicely upgraded and ready to run. Included are three grips total (the original HK grip plus two additional grips) and two stocks (the original HK stock and a Magpul STR stock). It also comes equipped with Troy HK-style backup iron sights, a A3 Tactical HK vertical fore grip, one 30-round magazine, and a gun bag for transport and storage.
If you’re looking for a high-end, combat-proven platform with HK reliability and premium upgrades, the MR556 A4 is an outstanding choice. Clean, well-equipped, and ready for the range or collection.
The rifle was test-fired with 30 rounds prior to shipping to ensure proper function and safety.
