My duty revolver in Air Force OSI in 1973 was a Moodel 36, 3" heavy barrel. We needed a concealable handgun for protection operations. We shot them a lot for training and proficiency. It was a surprisingly accurate little revolver but the military ammo we were using was wearing them out. It was replaced with a chopped 1911 in about 1979-1980. Pictured is the one from my collection.