FWIW, from the Korean War era until about 1965 the M3 was part of the OEM (Original Equipment, Manufacturer) Kit of the Jeeps, fuel trucks & other military vehicles.
(I think that it is “interesting” that hardly anyone ever stole a M3, when they were OEM.= CHUCKLE.)
Yours, TMN78247
The first USAF unit I was assigned to...a small 40 man stateside detachment..had two grease guns. Also, two M1911’s and M1 carbines for the rest of the men. Then along came LBJ and took them away and sent them to Vietnam.