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O-4M
The O-4M (О-4М) is a Bulgarian (VMZ) point-detonating (PD) semi-boresafe fuze that provides instantaneous- and delayed-impact (inertia) functionality. The O-4M fuze is used with various 60-82 mm mortar high-explosive fragmentation (HE-frag) mortar bombs, , along with similar nature projectiles for the RPG-7 (РПГ-7) launcher (recoilless gun. The O-4M would be modified to form the O-4M1 (О-4М1) and O-4N (О-4Н) fuzes, both of which are covered...
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