I DID NOT MAKE THIS MOD, its from the DCS forums, its by Hook47

https://forum.dcs.world/topic/135378-l-39za-heavy-weapons-upgrade-23mm-gun-pods-s-24

install it in root folder core mods aircraft

A Black Knights field mod which equips the L-39ZA with various upgraded weapon capabilities, based on weapons fielded in various host nations using the L-39ZA for COIN and Light Attack operations.

#### CHANGELOG ####
v1.0 = Added the following weapons to the L-39ZA:
FAB-500 M62
MBD-2-67U Ejector (4 FAB-100s)
S-24B Rockets
S-25 Rockets
UB-32 Rocket Pod
B-8M1 S-8TsM Rocket Pod (Smoke, Orange)
B-8m1 S-8JOM Rocket Pod (HE)
B-8M1 S-80FP2 Rocket Pod (AP)
B-13L S-13 OF (Heavy Rocket Pod)
Gshk 23 Gun Pod (MiG 21 type variant)
SPPU Gun Pods (SU-25 type variant)
AIM-9 Twin Rack
AIM-9 Single Store
R-73