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The Semi Auto MK 760

By Brian Zuzelo
Photos By Christine Hill

The MK Arms Model 760 SMG is known throughout the Class III community as an affordable and transferable clone of the Smith and Wesson M-76. The MK-760 SMG has received mixed reviews from many Class III enthusiasts. Some claim that weapon needs several modifications to critical parts to be considered reliable, while others have said their MK-760 ran perfectly out of the box. One difference between the MK-760 and S&W M-76 is that the MK-760 has a series of semiautomatic-only versions. Michael Rupplinger, founder and owner of MK Arms, created a semiautomatic carbine and pistol version of his MK-760, so those unable to own the SMG could enjoy the next best thing. The pistol and carbine versions were held to the same standards of quality as its full-auto variant. However, due to legal issues, as well as a number of setbacks for the company, these semiautomatic-only versions of the MK-760 never enjoyed much commercial success. The closed-bolt configurations of this weapon, however, have enjoyed a relatively high collector’s status and are fun to shoot.

During the Viet Nam war, the Carl Gustof Model 1945, or “Swedish K,” was an exceptionally popular submachine gun. It was praised for it’s reliability and it’s optimal cyclic rate of 600 rpm. The weapon could be found in the hands of Special Forces units and Navy Seals alike. This high quality post-war design could be had at surplus prices and were purchased to arm ARVAN forces in South Vietnam. The US Navy expressed interest in procuring a number of Model 1945s from the Swedish government, but were denied because of Sweden’s declared neutrality*. Smith & Wesson was then approached to create a weapon of similar quality are reliability. After a year and a half of design, S&W introduced the Model 76. The Model 76 incorporated most of the positive attributes of the Swedish K, such as compactness of the folding stock as well as the overall simplicity of the weapon. Close to 6,000 Model 76s were produced between 1967 and 1974*. The US Navy was then no...

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