Bit too many polies for this kind of model, but it's neat.
3/5 for now.
Get the poly count below 400 and the file size below 30 KB, and I'll easily give it a 4/5 because it looks good and it's not something we often see.
A 16-sided cylinder, which is well enough for this sort of thing, would have 32 polies to make the sides, 16 polies on the top, 16 polies on the bottom, and then the parts attached to it, such as the handle and other parts on the top, could be easily done in much less than 100 polies. Explosion could be done with particle emitters, and wouldn't need more polies. Bottom line: This could be done with the same visual quality in less than 200 polies, and using more than 900 is ridiculous.