HK MR556-A1 5.56mm 16.5″ FDE – Factory CA


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Factory converted CA compliant Fixed-Magazine rifle. Uses a Juggernaut Tactical Hellfighter device. The magazine release cannot be actuated until the action is disabled. Activating the rear takedown pin will open the upper enough to enable the magazine release. 

Based off the HK416, the MR556A1 is a semi-automatic rifle developed by Heckler & Koch as a premium level commercial/civilian firearm with match rifle capability. 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. This method of operation virtually eliminates malfunctions that are common to direct impingement gas systems since hot carbon fouling and waste gases do not enter the receiver area. This is the same key feature critical to the success of the HK416 rifles used by leading military and law enforcement customers.

Caliber 5.56 NATO
Capacity *10 Rounds, Fixed Magazine
Operating System Short Stroke Gas Piston
Barrel Length 16.5″
Barrel Cold Hammer Forged
Twist 1:7″, 6 lands/grooves
Trigger Pull 7.64 lbs
Length 33.68″ – 37.68″
Weight 8.6 lbs
Stock Magpul CTR
Pistol Grip Magpul K2 +
Finish FDE Cerakote
Sights Troy Micro Battle Sights,  Optics Ready Picatinny Rail
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HK MR556-A1 5.56mm 16.5" FDE - Factory CA


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