This video demonstrates the removal of a U.S. Army M577 detonator fuze from a 203mm / 8-inch submunition shell. The description details the Mechanical Time and Superquick (MTSQ) Fuze M577A1/M577, its compatibility with various artillery rounds (4.2-inch, 105mm, 155mm, 8-inch), and its airburst functionality. It explains the internal clockwork timing mechanism, setting procedures using an M35 fuze setter or screwdriver, and the function of safety and arming features like spin locks and setback pins. Differences between the M577 and M577A1 in their detonation initiation are also outlined. The video clarifies that the fuze shown is inert.
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