"Демпфированный укрепленный бронебойный автоматический гладкоствольный карабин" Final

Or rather "anti-armour", in this context

For those who can't read Russian: "Recoil-absorbing reinforced armour-piercing automatic smooth-barrelled carbine."

And a steampunk one, I guess: the sight is anything but hi-tech. :-)