1. PERCUSSION FUZE FOR PROJECTILES WITHOUT RIFLING, COMPRISING A FUZE BODY, A PLUNGER HAVING A PIN AND STRIKER HEAD IN A NOSE OF THE FUZE AND MOUNTED THEREIN A SAFETY POSITION OF THE FUZE, A SPRING IN THE NOSE AND ABUTTING AGAINST THE STRIKER HEAD, A RESILIENT LATCH HAVING TWO ARCUATELY BENT RESILIENT ARMS NORMALLY ENGAGING AN ANNULAR GROOVE IN THE PIN, SAID LATCH HAVING A SEMI-CIRCULAR END SECTION AT ONE END AND THE OTHER END OF THE RESILIENT LATCH BEING SECURED IN THE FUZE, AN INERTIA BOLT MOUNTED IN THE FUZE BODY WITH THE SEMICIRCULAR END SECTION EMBRACING THE INERTIA BOLT, A SAFETY INERTIA BOLT IN THE FUZE BODY, AND A LOCKING BALL ADJACENT SAID INERTIA BOLT, SAID BALL LOCKING SAID INERTIA BOLT UNTIL RELEASED BY SAID SAFETY INERTIA BOLT.