It looks like it’d jam after 2 shots-—like that thug gun the Tek-9
Depends on the condition of the magazine. But if the magazine is in good shape, I would bet not. You’ve never seen a sturdier or simpler weapon than the M-3 grease gun.
My Tek-9 has never, ever jammed.
Maybe because it's never, ever been shot...
I was a tank commander on an M48A3 tank in Vietnam. OEM equiptment on that vehicle was an issue of 2 M3 or M3A1 SMG’s per tank. You could drop that thing in mud, scoop the mud out of the chamber with your little finger, and the thing would shoot at 350-450 rpm with gobs of mud flying out of the ejection port. The tolerances were extremely loose, the rate of fire quite low. That fact coupled with it’s weight, made it extremely easy to keep long bursts on target within it’s effective range limitations, and was very reliable as long as the magazines were in good shape.
It was a VERY simple weapon. The gun in the picture appears to have been modified or repaired. Note the rivet at the front of the trigger guard. the trigger guard was designed to be pried off with the stock so as to remove the ejector housing. It is probably an M3A1. It appears to be lying flat on it’s right side. The M3A1 had a cocking lever that prevented that. There is no oiler on the ejector housing, as in the M3. The barrel nut appears to have been modified or badly worn.