HK 81001204 MR556 A4 5.56x45mm 10+1 16.50" Black Threaded BBL, Patriot Brown Pic Rail Rcvr, M-LOK Handguard, 6 Position Black Synthetic Stock, Ambidextrous,Tactical Rifles

Overview

The HK MR556 A4 is a semi-automatic tactical rifle chambered in 5.56x45mm NATO, featuring a 16.50-inch threaded steel barrel with a 1:7" twist and 5/8"x24 thread pattern. Built around a reliable short-stroke gas piston operating system, it prevents hot carbon fouling from entering the action, which extends maintenance intervals and reduces internal wear. An adjustable gas regulator lets the operator tune the system for optimal suppressed or unsuppressed operation. This model is finished with a Patriot Brown Picatinny rail receiver, a black M-LOK handguard, and a 6-position black synthetic stock. Fully ambidextrous controls, including an ambidextrous safety lever, combine with a slimmer profile and lighter weight to make the rifle highly adaptable and easy to manipulate. It weighs 7.67 lbs, measures 36.50 inches overall, and ships with a 10+1 capacity.

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