. "5.7x28mm FN" . "5.7mm" . . . . . "expand the definition of armor-piercing ammunition" . . . . . . . . "5.7\u00D733mm" . "FN 5.7\u00D728mm" . . . "FN 5.7x28mm" . "5.7\u00D728 mm" . . . "FN 5. 7\u00D728mm" . . "FN 5.7\u00D728mm" . . "FN 5.7\u00D728mm" . . . . . . "5.7\u00D728mm" . "FN 5.7x28mm NATO" .