This cartridge was officially introduced today as a new round for shotguns, intended for hunting, sport shooting,plinking and home defence
based on 7.62x39 case necked up for 9.55mm slugs and cut to 37.5mm
Obvious niche - use in surplus 7.62x39 rifles, factory converted (bored out or rebarreled) into shotguns and thus certified and registered. As of now, SKS are to be converted and sold on shotgun license. Apparently, a smooth-bore AKM rifles, restricted to semi-auto, are next to be offered. Standard bore configuration for weapons thus chambered is cylinder with Paradox rifling at the front of the bore (last 140mm)
The only reason for this is stupidity of Russian gun lwas: for get a rifle license (any rifle, even a single-shot .22) one must have minimum of 5 years of legal shotgun ownership under his belt.
That way many will be able to shoot military-looking and almost authentic weapons without a stupid 5-years wait.