[R.I.T.Z]

Great work.

Originally Posted by m102404

Very nice work!

I would have been tempted to use foam shims and epoxy to fix the new position of the mag within the shell.

I'm modding a Polar Start to fit one with a full length barrel. No issues with running out of air for the barrel length.

I thought the polar star mechboxes where just simple V2 drop ins.
or are you doing some custom work that doesnt involve fitment ?