Frankford Arsenal Rare Model M9 M16 9MM with Internal Suppressor by Ciener. This is an exact copy of a Colt 9MM carbine made for the Drug Enforcement Agency. It uses cheap Sten magazines and functions perfectly. Take out the detachable magwell adapter and change uppers and you can shoot .223. Included is a complete quality .223 upper and magazine. Very few of these guns were made and this is the only one I have seen.