The 20×102mm cartridges are used in the M61 Vulcan and the M197 Gatling Gun. These rounds include target practice, armor piercing, high explosive incendiary rounds, as well as ammunition for the C-RAM and the Phalanx CIWS.

The MK244 Armor-Piercing Discarding Sabot ELC (Enhanced Lethality Cartridge) is the standard ammunition used with the Mk-15 Phalanx Close-in Weapon System. The ammunition features 40% less dispersion and a 48% heavier penetrator compared to the previous MK149 ammunition, which makes it more effective against fast attack boats, anti-ship missiles, helicopters, small watercraft and low flying planes.

The M940 Multipurpose Tracer-Self Destruct (MPT-SD) cartridge combines a light armor and high-explosive capability into a single round for improved lethality on all targets, making it the optimum single round solution for ground-to-air and ground-to-ground applications. It also features a bright red tracer for increased visibility.

The PGU27A/B Target Practice rounds are cost-effective training rounds ballistically matched to the PGU-28A/B.

The PGU-28A/B Semi Armor Piercing High Explosive Incendiary (SAPHEI) round provides broad target spectrum capability by combining light armor and high explosive features into a single round. Itutilizes basic multipurpose technology with enhanced and optimized ballistics to offer substantial improvements in effectiveness over the older M50 series ammunition.

The PGU30A/B Target Practice Tracer rounds are cost-effective training rounds ballistically matched to the PGU-28A/B.