The DP-61 Duel (дуэль in Russian) is a Soviet grenade launcher.
The DP-61 is meant to fill a similar role to the DP-64, which is defending dockyards and repelling submarines. Very little else is known.
The weapon is based on the MRG-1 Ogonyok. The weapon's barrel can be tilted up to 45° upwards for various lines of fire.