Active
Historical

1

12.7-mm UBK-12.7
12.7-mm/.50-caliber GAU-21 machine gun
12.7-mm/50-cal GAU-19/A GECAL Gatling gun

2

20-mm M197
20-mm M61 Vulcan Gatling gun
23-mm GSh-23
23-mm NS-23
25-mm GAU-12/U Equalizer
25-mm GAU-22/A
27-mm BK 27 Mauser cannon

3

30-mm Aden
30-mm DEFA series
30-mm GAU-13/A Gatling gun
30-mm GAU-8/A Avenger
30-mm Giat Model 781
30-mm M230 chain gun
30-mm NR-30
30-mm Type 30 M 791 cannon
37-mm N-37

a

Aero-adaptive Aero-optic Beam Control (ABC) turret

m

M134 Gatling gun

r

Remote Guardian System

s

Stand-Alone Weapon System (SAWS)

t

THL 20/THL 30
TM 197B light turreted gun system