.223 Rem | 5.56 NATO

Smith & Wesson

Smith & Wesson M&P15 Sport III 5.56mm Semi-Auto Rifle with 15-Inch M-LOK Rail and Red Dot Sight

Smith & Wesson

Smith & Wesson M&P15 Sport III 5.56mm Rifle with Tactical Stock and 10-Round Magazine

Smith & Wesson

Smith & Wesson M&P15 AXE PC 5.56 Gray Rifle with Collapsible Stock and Gemtech Upgrades

Smith & Wesson

Smith & Wesson M&P15 Sport III 5.56 NATO Rifle with 30-Round Magazine

Smith & Wesson

Smith & Wesson M&P15 Sport III 5.56 NATO Rifle with Collapsible Stock and Free-Floating Rail

Heckler & Koch (HK USA)

Heckler & Koch MR556 A4 5.56 NATO Rifle with Collapsible Stock

Ruger

Ruger AR-556 Model 8500 5.56 NATO Semi-Auto Rifle with 16.10-inch Threaded Barrel and Collapsible Stock

Springfield Armory

Springfield Armory Hellion SPG HL916556B 5.56x45mm NATO Bullpup Rifle with 16-Inch Barrel and Adjustable Stock

Smith & Wesson LE

Smith & Wesson LE M&P15A 5.56 NATO 16-inch Semi-Auto Rifle with Black Finish and Tactical Features

Smith & Wesson LE

Smith & Wesson LE M&P15 MOE 16-inch 5.56 NATO Semi-Automatic Rifle with Magpul Stock and Black Armornite Finish

Smith & Wesson LE

Smith & Wesson LE M&P15X 5.56 NATO Semi-Automatic Rifle with 16-Inch Barrel, Black Finish

Sig Sauer

Sig Sauer RM400SDI16BP M400 X-Series 5.56x45mm Rifle with 16-Inch Barrel and Magpul SL-K Stock