The upper receiver is definitely all made by La France. The boxy Fisher-Price looking carry handle is quite distinct. All sources say the lower is also proprietary, but I’m pretty sure they at least started with an existing 80% lower and modified it given how standard all the fine details look, and how drastically different the machining is to the upper.

It’s firing .45 ACP (Automatic Colt Pistol), a pistol cartridge, out of a 7.5 inch barrel. It is stabilized. For comparison the standard size 1911 has a 5 inch barrel, the Kriss Vector SMG has either 5.5 or 6.5 inch barrel (depending on model), and the M3 Grease gun has an 8 inch barrel.

I truly don’t know but please don’t touch the La France hardware with it.