The HK MR556 A4 is the commercial evolution of the legendary HK416, bringing one of the most respected modern rifle platforms into a semi automatic configuration built for serious shooters and dedicated HK enthusiasts. Designed around the same engineering principles that made the 416 so widely trusted, the MR556 A4 delivers the kind of refinement, durability, and mechanical confidence expected from a true HK rifle.
At its core is HK’s proven short stroke gas piston system, engineered to run cleaner and cooler than direct impingement rifles while reducing fouling and wear on internal components. Paired with a 16.5 inch barrel, fully ambidextrous controls, and a free float handguard with full length top rail, the MR556 A4 offers a balanced, modern layout that is equally suited to hard use, range time, and long term ownership.
More than just another premium AR pattern rifle, the MR556 A4 carries the fit, finish, and operating character that distinguish the HK platform from the rest of the field. Its full size configuration gives it a steady, capable feel while preserving the lineage and reputation that continue to make the platform so desirable.
This configuration ships with one 30 round magazine and remains one of the most sought after modern HK rifles for those who value reliability, pedigree, and proven design.
For the buyer who wants the closest commercial path to the HK416 legacy, the MR556 A4 remains one of the strongest names in the category.
MPN: 81000827
Magazine Compliance Notice:
For orders shipping to states with magazine capacity restrictions, compliant magazines will be substituted where required.
$3,749.00
Out of stock
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