MIL-PRF-71139A, PERFORMANCE SPECIFICATION: CARTRIDGE, 25MM; HIGH EXPLOSIVE INCENDIARY WITH TRACE (HEI-T), M792 (22 OCT 207) [SUPERSEDING MIL-C-71139]., This specification describes the performance requirements and verification procedures for the CARTRIDGE, 25MM, high explosive incendiary with trace (HEI-T), M792 (see 6.1).