Designation
20 × 102 mm MK149 GFI APDS
Ammunition type
Armour-Piercing Discarding Sabot
Cartridge length
168 mm
Projectile mass
93 ± 3 g
Velocity at 23.7 m
1,036 m/s
Accuracy at 100 m
Average diameter 10.3 cm
Primer
M52A3B1 electrical primer
Compatible systems
M61, M197 and MK15 Phalanx