Made a little gun toy as a fidget spinner. Made with slide back barrel, flip up muzzle and spinning wheel.

Assembly:

Carefully remove all supports, than insert both clips in that half with opening for muzzle release button and insert button.

Put wheel in place and clip on other half of body, you can use a bit of superglue.

You will need one little rubber band, around 3cm in diameter and one purge line from your printer and cut off that angle on the end. Bend that purge line in middle and put it through rubber band.

Than attach rubber band to hook in barrel and put that purge line through little hole behind button.

Now attach barrel to the body and pull that rubber band through that hole.

Then attach rubber band to hook on muzzle and clip muzzle to the body.

And now you are done :)