Shot Easy was the fifth nuclear detonation of Operation Tumbler-Snapper, fired on 7 May 1952 at 04:15 local time from a 91-metre tower in Area 1 of the Nevada Test Site. The device — designated BROK-1 — was a prototype of the TX-12, the development version of the Mk-12 tactical bomb. The Mk-12 was designed for external carriage by high-speed fighter-bombers: a slender, lightweight weapon with an implosion system of just 56 centimetres in diameter weighing 249 kg — a record at the time for small diameter and low weight in an implosion device. Total device weight was 283 kg. The shot produced 12 kilotons against a predicted yield of 9 kt, exceeding expectations. The Mk-12 subsequently entered service in 1954, representing a significant step toward compact tactical nuclear strike capability.