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This Mk-54 "Little Boy" design features a black steel gun tube, 24 inches high, designed using U-235 material. It includes arming and timers components along with a nuclear trigger charge inside the tube. The base plate has recesses for two squib cells, Nuclear "O" rings, and a sizing collar. It weighs 0.25 lbs each with silver dollar-sized squib cells. This equipment is for official use only by the FBI Academy - BSU Unit.
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Mk-54 ("Little Boy" design using U-235) Arming/Timers Black Steel Gun Tube 24” High, #10 can size wide Inside tube is the nuclear trigger charge Black Steel sizing collar Black Steel Base Plate Bottom recesses for 2 squib cells 3 Nuclear “O” Rings Slightly convex Squib cells Silver dollar size Wt. 25lbs each 14 inch diameter Three inch thick Six diameter hole For official use only – FBI Academy – BSU Unit