Gabe from Louisiana Firearms provides an expert review of the HK MR 556A4, highlighting its short-stroke gas system derived from the HK416. He details its impressive accuracy potential, estimated at 1 MOA or better, and discusses optimal accessory configurations for both the 11-inch and 16.5-inch barrel variants. The review emphasizes the rifle's superior ergonomics, full ambidextrous controls, and unique safety feature.
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