by Shooting Illustrated Staff posted on February 28, 2011 Guns Support NRA Shooting Illustrated DONATE ** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. ** Barrett REC7 in 5.56 NATO In this article AR, AR-15, Barrett, Magpul, semi-auto rifles Related Stories Barrett REC7 in 5.56 NATO Barrett REC7 Chambered in 5.56 NATO Gallery The Truth About Pistons Yankee Hill Machine Desert Enforcer Colt Match Target M4 Gallery Most Popular 10mm vs. .40 S&W: Similarities, Differences and Uses First Shots: Springfield Armory Hellcat OSP .380 First Look: Wilson Combat Division 77 Project 1 Ghost Pistol Marines Ditch 100-Year-Old Marksmanship Standards What I Didn’t Learn In Special Forces The Seven Habits of Highly Effective Concealed Carry