Origins may not be 100% right.
No textures, LOD variants or real-world scale.
Blender's bevel modifier may have created some coincident vertices.
All objects are parented to one object.
Objects are named.
Most modifiers have not been applied.
You will have to re-make glow effects.
Objects not named.
Comes with working MTL file.
Edge split has been applied(uses vertices that occupy the same area).
Origins all in one place, gun is not in center.