I like how you made the barrel smaller. Looks definitely better than the original and feels more like the real thing.
Textures are good for a try, tho handle can be a bit improved and I see how you've reused CS 1.6's AK textures on this. Nice touch! :)
There are many UV misalignment on all textures (e.g 123) to fix that I recommend using this more up-to-date compiler. It might also change the resolution of textures by adding some black spaces but that's for the better since it'll make it look a bit better in-game.
World model "w_357.mdl" is using external textures which creates 2 separate .mdl files for model and textures. This technique is so outdated and may cause issue. I highly recommend removing that feature by decompiling the model and removing the line $externaltextures from the .QC file and recompiling again.
The chrome textures are a bit milky in color. It's ok but yeah I don't feel it looks good, suggesting to change that a bit
=Note: If you want I made some high-res textures for the LD HEV hands but never had time to release them. So If you wanna recompile this you can use these textures here but make sure you use the compiler I linked above.
Nice work overall. If rating system was still here I'd rate this like 8.6/10 which is very good by the way .. Good luck in your future projects! :D
Should add in screenshots otherwise people won't download or the mods will takedown the post. I'll download it tho since I'm curious edit: sorry for some reason my browser refused to load in the images. also nice skin i just think the wood grip should be a little darker