The M940 MPT-SD is a Northrop Grumman 20x102mm cartridge in the U.S. Army's 20 mm ammunition suite, built as a multi-purpose tracer self-destruct round for the land-based Phalanx / C-RAM system. Northrop identifies it as the 20 mm round fired from C-RAM, and Army budget material lists the M940 as a war-reserve cartridge with a 1989 type classification date.
Northrop Grumman identifies the M940 as a 20 mm cartridge fired from the C-RAM system.
| Firing weapon | Weapon type | Firing evidence |
|---|---|---|
 | Land-based close-in weapon system | Northrop Grumman says the M940 20 mm cartridge is fired from the C-RAM system. Sources: Northrop Grumman Ammunition, 20mm x 102mm Suite of Ammunition Product Brochure |
