The DT-29 is a Soviet light machine gun developed in the late 1920s as a modernization of the earlier DP-27. It was chambered in 7.62×54mmR and designed specifically for armored vehicle and tank use, definitely for infantry uses but supposedly, someone out there was desperate enough to just yank the MG off a vehicle and put on some crude stock and bipod.
Model from Enlisted; Thanks Bogster!