Description
Booster M25 is similar to booster M21A4. It differs only in having three external threads, instead of six, which do not receive the fuze. Boosters M25 of early manufacture have a safety (cotter) pin with pull ring which must be removed when preparing for firing. This booster is used only with concrete piercing fuze M78A1 (or M78).
Functioning
No information about functioning.
See Also
Source(s)
TM 9-1300-203, Artillery Ammunition (1967)
