modded weapon animations

[Reikyfoxxe15]

Ive been fiddling in geck trying to make millennia's an-94 use Hitman's ak reload animation and change the ammo it uses to an ammo included in Heffy's ak and ar-15 pack. (for personal use and not redistribution)

 

but any time I try to edit it, it either doesn't change, doesn't fire a shot, has infinite ammo, or it turns into a fists weapon.

 

there are plenty of tutorials on creating custom vanilla weapons. but I want to customize a modded gun with modded animations and assets.

 

I have yet to find a tutorial on how to do that. so any help or direction would be greatly appreciated.