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 Tech Wisdom: Ancient Ammo Review: Smith & Wesson Bodyguard 2.0 See Your Sights Classic Guns: USMC M40A1 Sniper Rifle The Return Of The Lever-Action Rifle Avoid It If You Can