This is an example of a post war production M37 machine gun. This model was developed in the late 1940s/early 1950s by SACO-Lowell Division and was basically an updated/improved Browning 1919 MG. 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 with a tripod, pintle and T&E mechanism. It has the standard medium weight barrel with a perforated barrel jacket with this example being a "flex-mounted" version as it is equipped with the tangent rear sight and a side mounted cocking lever. The side of the receiver is marked: "No.5694 U.S. INSP. RBA/GUN MACHINE CAL .30 M37/U.S. PROPERTY/MFD. BY SACO-LOWELL/SHOPS/BA4 - 4\69". It is stamped with an importers mark directly behind that.

Very fine with 90% of its arsenal style gray parkerized metal finish with edge and high spot wear with finish loss and thinning on the perforated barrel jacket. NOTE: This weapon is a restricted, National Firearms Act (NFA) Class 3, Fully Automatic Weapon, that 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. This weapon is currently registered as being "LIMITED TO USE AS A SALES SAMPLE (Pre-86)" and as such can only be purchased by an FFL, with a Class 2 or Class 3 SOT License.