Some observations:
- The pistol grip might be too wide, then again making it 1 pixel narrower might look too narrow

- The magazine could be a little bit longer, and more straight at the top
- An AK doesn't really have a magazine well like an AR-15 does
- What's that bright brown slightly curved part between charging handle and handguard?
- The front sight should be the same height as the rear sight
- The rear sight is slightly more complex and longer, not just a small two-pixel part
- The charging handle is just a piece of metal potruding from the bolt cover, in the sprite it is a weird cube with grey borders
- An AK-47 has a stubby barrel, yours looks more like that of an AKM with the slant to it