Please pack it right in the next update...
Some faces have mixed up normals. The barrel has double faces, causing it to flicker black/grey. And I think you mixed something up with the textures, dunno, but it seems like they're either bright or dark/black.
And (like already said) at least fix the floating thing on the reloading animation. Imo the whole animation looks strange.
All the sounds except the clip-in-sound are stereo, they should be mono. The firing sound could be alot shorter - the second half of it contains just silence.
Otherwise it's okay.
I hope I forgot nothing... :P
Poll