by Shooting Illustrated Staff posted on October 13, 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. ** Primary Weapons Systems goes out of the box in AR design. In this article 5.56 NATO, 7.62 NATO, AR, Primary Weapons Systems Related Stories Primary Weapons Systems PWS MK116 and PWS MK216 Carbon-Fiber Rifle Round-Up Gemtech Suppressed Bolt Carrier AR-15 Muzzle Brakes 14 New Rifle-Caliber Pistols for 2019 Most Popular Building A Bolt-Action Rifle I Carry: Ruger Security 380 Pistol in a DeSantis Holster SAR USA SAR-9 Gen 3 Subcompact Pistol Review West Virginia Police Select Shadow Systems Pistols Black Friday Specials 10 Budget-Priced .22 Rifles Under $200