I used:
- leader movie Ironhide's left arm gun;
- some cogs left over from making the Forge of Solus Prime;
- the top of two of those cylinders from near the front wheels of a junker leader OP's truck;
- random spike from some movie figure;
- random round posts from goodness knows where;
- the casing of a clicky pen;
- the button of a clicky pen;
- rings from superglue tubes;
- plenty of ice cream tub cuttings.
I'm annoyed that I forgot to photograph the gun before painting it to show you how it's done, so this will have to do:
