 It is capable of a "shot-a-second" firing rate.With the magazine loaded and a round in the chamber, the Semmerling LM4 is capable of carrying five .45 ACP rounds.During 2005, the largest collections of Semmerlings comprising examples of the LM1, LM2, LM3, LM4 and the XLM along with all prototypes, tooling, drawings, production and testing equipment, advertising materials and leather accessories were provided to the National Firearms Museum, the Cody Firearms Museum and the Smithsonian.