Pull-Release Type Firing Device

In the pull operation, a direct pull of 6 to 10 pounds on the trip wire causes the release pin and firing pin to be pulled outward until the jaw end of the firing pin passes beyond the constricted opening of the body. In this position, the jaws spread, thereby releasing the firing pin which, driven by its spring, fires the primer 

7) Pressure-Release Type Firing Device M3 (Demolition) (Fig 28) has been used to activate antitank mines equipped with supplemen- 

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