
Point detonating fuze XM593 is provided for use with the high explosive 90mm XM591 cartridge. The fuze is a modification of fuze M524A1 (M524E2) used with 81mm cartridges. The modification involves a change to the arming mechanism - delayed arming has been shortened.
No information about functioning.
MIL-HDBK-146, Fuze Catalog (1982)
TM 9-1300-203, Artillery Ammunition (1967)