HK A1 223 Remington/5.56 NATO AR15 Semi Auto Rifle - Blue/Black, 16.5" Barrel, 30+1 Rounds, Synthetic, Adjustable Stock
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HK 81000579 RI MR556A1 MLOK (1)30RD
A direct descendant of the world-famous HK416, the MR556A1 is the
commercial carbine from the same DNA. It offers the battlefield-proven
reliability, durability and precision you would expect from a rifle that
bears the name Heckler & Koch. The MR556A1 is assembled in the USA
using US and German-made components and uses many of the same parts and
assemblies developed for the HK416. 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.