Hats off polar, this is a great model and texture!
I do have a few pointers that you could look at if you want, just to slightly improve the overall result.
You can notice that 1 bullet isn't properly placed and goes through another face (see image).
As for the bullet textures, not all the flag are aligned/rotated to the same POV (example the Canadian flag), with my next time is that you could also look at the USA flag, looks a bit weird around the corner.
And my last thing would be, if you have other GunZ models or the bullet model, you could use one of the original bullets for your model (sure you might add 20 poly but that wouldn't matter for the better result).
By all means I am not hating @people who know shit about this topic, I am just giving some feedback to improve himself.
