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 Stag Arms Model 3 Bushmaster ACR Wilson Combat SPR Gallery Rock River Arms LAR-PDS Carbine Most Popular So What’s Next? Jim Cirillo’s 1-2-3-6 Drill Be More Than A Bodyguard Which Shotgun Safety Is Best? Grocery Stores Lining up for Ammo Vending Machines Review: Smith & Wesson Model 1854 Rifle