Hk Mr556-a1 5.56mm is Built to dominate in durability, accuracy, and reliability, the Heckler & Koch MR556A1 is a civilian version of the battle-proven HK416—crafted for elite performance with a semi-automatic twist. Chambered in 5.56mm NATO, it’s the go-to rifle for shooters who demand mil-spec quality and modern modularity in one rugged platform.
Buy HK MR556-A1 5.56mm 16.5″ Rifle MLok – CA Online
Developed by Heckler & Koch as a premium class commercial/civilian firearm with match rifle capabilities, the MR556A1 is a semi-automatic rifle based on the HK416. Similar to the HK416, the MR556A1 represents a significant advancement above traditional AR-type carbines and rifles.
The gas tube typically found in AR15/M16/M4-style weapons is replaced with a piston and a solid working “pusher” rod in the HK-exclusive MR556A1 gas piston operating mechanism. As hot carbon fouling and waste gases do not penetrate the receiver region, this manner of operation essentially eradicates the problems that are typical of direct impingement gas systems. Leading military and law enforcement customers employ this same crucial component of the HK416 rifles, which is essential to their success.
Specifications of HK MR556-A1
Caliber : 5.56 NATO
Capacity : 10 rounds
Operating System : Short Stroke Gas Piston
Barrel Length : 16.5″
Barrel : Cold Hammer Forged, Medium Contour
Twist : 1:7″, 6 lands/grooves
Trigger Pull : 7.64 lbs
Length: 33.68″ – 37.68″
Weight : 8.6 lbs
Stock : HK Telescoping
Handguard : M-LOK Compatible
Finish : Black
Sights : No Sights, Optics Ready Picatinny Rail
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