Militärgewehre-Enzyklopädie, a German translation of a Dutch book, contains what I believe may be the only reference to the bizarre dual-barrel creations of ITM Tool and Die (Cleveland, OH).

The ITM Model-4 Prototype

Both barrels of the Model-4 are chambered in 9mm Parabellum. The top barrel is 12″ and the bottom is about 6″. It has a single trigger, and fires at a rate of 800 rounds/minute. It weighs nearly 8 lbs!

ITM Model-3

The Model-3 gun chambers 7.62x51mm in the 16″ top barrel and 9mm Parabellum in the 7.8″ lower barrel. This too has a single trigger. I am not sure if pulling the trigger fires both barrel, or there is a selector switch. Like the Model-4 also cycles at 800 rounds/minute. The Model-3 weighs 9.7 lbs, presumably unloaded.

ITM has developed many other 9mm and 7.62x39mm machine gun prototypes, both in single barrel and dual barrel configurations. You will have to purchase Militärgewehre-Enzyklopädie to see photos of these as I do not want to publish the entire chapter of a book. ¹

I spoke to the owner of ITM Tool and Die and he confirmed that they are still developing prototypes, although he was not willing to disclose any information about their current projects or the guns featured in Militärgewehre-Enzyklopädie.

Many thanks to Sven (Defense and Freedom) for the tip.

Many thank also to A. E. Hartink, the books’ author, for letting me use his photos.