Wiktionary
n. (context dated gangster slang English) A machine gun, particularly the http://en.wikipedia.org/wiki/Thompson%20submachine%20gun or similar.
Usage examples of "stutter gun".
Ward contacted the commander on the general wavelength and soon stutter gun shells began to come through one of the boxes, switched out from the Drain and across to Solmars and the waiting naval station there.
We found the stutter gun he used, he left it on the kitchen table, nice and neat.
The only way the scummies could reach the gate was down the long, narrow gate tunnel, and anything his stutter gun could have added to the carnage of Gronningen's plasma cannon in such confined quarters would have been superfluous.
The only way the scummies could reach the gate was down the long, narrow gate tunnel, and anything his stutter gun could have added to the carnage of Gronningen’.