Manufactured as a closed-bolt semi-automatic copy of the signature World War II MP 40 SMG. SSR markings on underside of receiver and "MP40/bnz.42" marking on endcap. NOTE: This weapon is a National Firearms Act (NFA), fully transferable Class 3, which is registered with the Bureau of Alcohol, Tobacco, Firearms and Explosives, (BATFE) under the provisions of 18 U.S.C. Chapter 44 and 27 CFR part 478.