by Shooting Illustrated Staff posted on February 23, 2012 Guns Support NRA Shooting Illustrated DONATE Heckler & Koch's MR556A1 is a version of the terrorist-quashing HK416 that you can own. In this article 5.56 NATO, bin Laden, Heckler & Koch, HK416, SEALs, semi-auto rifles, Heckler & Koch MR556A1 Related Stories Heckler & Koch MR556A1 First Look: Heckler & Koch 75th Anniversary Firearms Stag Arms Model 3 Bushmaster ACR Wilson Combat SPR Gallery Most Popular New Handguns for 2025 First Look: Foxtrot Mike Mike-9 9mm Receivers Top 5 'Budget-Priced' .50 BMG Rifles Shotguns: Turkish Shotguns Handguns: Reliability vs. Liability 10 Budget-Priced .22 Rifles Under $200