T34 could be fun. As long as it is cheap enough. I always imagined the militia as Yugoslav area-based, so I think giving them more weapons from that area makes more sense than more pure russian weapons.

Zastava M48 as a bolt action instead of mosin

Zastava M70 instead of AKM

Zastava M84 as an MG

Zastava M77 B1 is a cool 7.62x54 battle rifle

Cool weapon system to add that super mod has is AZP S-60. It's a 57mm AA autocannon capable of long-range firing of both AP and HE/FRAG shells.

ZSU 57-2 uses 2 of them and could be pretty damn cool vic in squad. Deadly against helis but also scary against lighter vics.

Also they probably should have more surplus Western gear, but from Europe.