The HK MR556A4 meets the Moondust test.
This video subjects the HK MR556A4 rifle to the "Moondust Test," a challenging durability evaluation. While the specifics of the test aren't detailed in the description, it implies a rigorous trial of the firearm's performance under adverse conditions. The video also promotes the creator's Patreon, Twitter, Rumble channel, and a discount code for Challenge Targets, as well as mentioning Modern Gun School.









