Smith & Wesson M76 Smith & Wesson M76 The Smith & Wesson M76 submachine gun was produced by Smith & Wesson from 1967 to 1974. It is an adaptation of the Swedish Carl Gustav m/45 with an open bolt design and fires 9x19mm Parabellum ammunition. In 1966, the Swedish government blocked the sale of firearms to the United States because it opposed the Vietnam War. This created a problem for the Navy SEAL Teams which were using Swedish-made m/45 submachine guns in covert operations in Southeast Asia. Noting this, Smith & Wesson began to produce the M76 (an m/45 clone), which was ready for
Smith & Wesson Model 4506 Smith & Wesson Model 4516: Compact version with a 3 " barrel on a smaller frame accepting 7 round single column magazines. Smith & Wesson Model 4546: Double-action-only version of the 4506 with a rounded, stubby hammer. Only produced in 1992. Smith & Wesson Model 4563: Midsize version with a 4" barrel on a full-size alloy frame. Smith & Wesson Model 4566: Midsize version with a 4" barrel on a full-size steel frame, the 4566 was formerly the issued sidearm of the New Hampshire State Police. Current issue (June 2015) with West Virginia State Police, in DAO (Double-Action-Only; TSW version),