Pandora's Mag (7.62x51mm)
Made out of 100% shapes, fully recolorable no ungrouping necessary.
Credit to Alex - ThePandoraGuy for the mag idea
and Hongooi for the transparency squares technique (though I used a different shaded circle and that recolored better)
The left one is entirely out of white shapes (aside from the rounds)
Double size (or the size you see above):
And for the sake of full disclosure I edited these two images together in Photoshop and removed the left images tag and left the other alone no other editing was done!