Heckler & Koch MR556 A4 AR-15 5.56 Black 16.5" Barrel 30 Round - 81000827

HK MR556 A4

The HK MR556 A4 Rifle with 16.5” CHF barrel; gas piston system; adjustable gas regulator; steel frame; custom rail system; ambidextrous safety lever; 30-round magazine; 33.25” – 36.5” overall length; 7.5” height; 3.07” width; and 7.67 lbs. weight.

Based on the legendary HK416 platform, the MR556 A4 was engineered not just with careful attention to detail, but also with premium materials, all to ensure rugged performance, uncompromising accuracy, reliability and durability.

Featured on it is the popular short stroke gas piston operating system which does not introduce hot carbon fouling back into the action; as a result, the weapon runs longer, with less wear on internal components than direct-impingement ARs, and less maintenance required ultimately. An adjustable gas regulator has also been featured on this HK MR556 A4 for sale to enable you tune the action specifically for suppressed or unsuppressed operation.

A 16.5-inch, cold hammer-forged barrel ensures precision and accuracy; a customizable, free-floating rail system provides ample room for the attachment of accessories like optics, grips, etc.; a 4.5 - 5.6 lb. trigger enhances the shooting experience; and ambidextrous controls such as the installed safety selector make for user convenience.

On the whole, the HK MR556 A4 is an embodiment of precision engineering and tactical performance. Thanks to its lighter weight and slimmer profile, the weapon is easier to operate and wield. Also worth noting is that the A4 rifle enjoys extensive aftermarket support, and you can purchase a variety of great accessories to take your shooting to the next level.