Buy MR556A1 Online
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. In the “closed” HK piston system, exhaust gasses never enter the receiver, which means the HK runs cooler, cleaner and more reliably.
When adverse conditions, like dust, sand and mud are introduced, the advantage of the HK system becomes even more drastic. That is why so many of the worlds elite military and law-enforcement customers have absolute trust in their HKs.
What’s in the Box
HK MR556A1 5.56mm Optics Ready AR-15 with M-LOK Handguard
(1) 30-Round Magazine
Cable Lock
Owner’s Manual
Firearm Specifications
Manufacturer: HK
Model: MR556A1
Caliber: 5.56mm NATO
Barrel Length: 16.5″
Overall Length: 37.68″
Receiver Finish: Black
Sights: None; Optics Ready
Handguard: M-LOK Handguard
Stock: Adjustable
Magazine Capacity: 30 Rounds
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