5.7 x 28mm

Smith & Wesson

Smith & Wesson M&P FPC 5.7x28mm Carbine with 16.25-inch Threaded Barrel 14170

Smith & Wesson

Smith & Wesson M&P FPC 5.7X28mm Carbine with 16.25-inch Threaded Barrel

Keltec

Keltec SUB-2000 Gen 3 Rifle in 5.7x28mm with Collapsible Stock and 20-Round Magazine

Keltec

Keltec SUB-2000 Gen 3 5.7x28mm Rifle with Folding Stock in Olive Drab Green

Keltec

Keltec SUB-2000 Gen 3 Rifle in Tan with 20-Round Magazine - Model SUB2K57TAN