This replica is made of plastic and has a removable magazine.
 
The Military Armament Corporation Model 10, officially abbreviated as "M10" or "M-10", and more commonly known as the MAC-10, is a compact, blowback operated machine pistol/submachine gun that was developed in 1964. It was used by US special forces, including LRRPs and Navy SEALs, in the Vietnam War and the Invasion of Grenada.