This is an example of a very desirable, late production M37 light machine gun. This model was developed in the late 1940s/early 1950s by SACO-Lowell Division that was basically an updated/improved Browning 1919. Improvements were made to the bolt and feed mechanism that allowed it to be switched from a left to right hand feed, which made it a perfect candidate for use as a coaxially mounted tank machine gun. They were primarily used on the M48 and M60 Patton medium tanks. It was also still employed in a flex-mounted version as an infantry weapon when equipped with the standard sights mounted on top of the receiver and a tripod of some type. It has the standard medium weight barrel with a perforated barrel jacket. This example is being a "flex-mounted" version as it is equipped with the tangent rear sight base (no rear sight) and a side mounted cocking lever. The side of the receiver is marked: "No. 24380 U.S. INSP. RBA/GUN MACHINE CAL .30 M37/U.S. PROPERTY/MFG. by SACO-LOWELL SHOPS". The right front side of the receiver is also stamped with a very small: "INTER-AMERICAN/IMPORT-EXPORT CO.". This scarce and desirable machine gun does not include any additional accessories, mount or tripod; however, they are easily acquired on the secondary market. Additional Information: the right rear side of the side side plate has four threaded holes that we believe are for some type of scope mount, however no mount included with this lot. Also it is missing the complete rear sight assembly, which would confirm the previous note.