Parametric Chamber Flag

I had some orange plastic in the printer after Halloween that I wanted to use up so I figured I'd print some chamber flags. I didn't want the heart one on here and although I like the 22LR one here I wanted something in 556 so I coded this up. I started with a 5.56 NATO round I found here (http://www.thingiverse.com/thing:55798) and then replaced it with a SCAD generated round rather than the STL import. I left the import in as a comment. I included some modules to make 5.56 NATO, 7.62x39, .50 BMG, and .22 LR.

Post a make if you print it. Also if you have a spacing measurement for a rifle, post it in the comments and I can add an STL other than the AR 5.56 one. For instance I don't know the length of the "red" spacer in the model for an AK-47.