The 2A65 "Msta-B" is a Soviet towed 152 mm howitzer. The "B" in the designation is an abbreviation for Buksiruemyi, or towed. This weapon has been fielded in Russian forces since at least 1987 and is currently in service with Russian front and army level artillery units. The 2A65 howitzer, like many pieces of modern artillery, is capable of firing nuclear artillery shells.