The M940 MPT-SD (multi-purpose tracer, self-destruct) shell is a 20×102 mm round produced by General Dynamics primarily for an anti-aircraft role.
The round includes a red tracer to aid in targeting.
The round includes a high explosive and incendiary component and can also defeat light armor (hence its multi-purpose designation).
[1] The self-destruct feature engages at approximately 2,300 metres (7,500 ft)[2] and destroys the round, preventing it from falling back to earth and inflicting damage to the surrounding territory.
This ammunition-related article is a stub.