Grrr! Now you have me thinking of a 9mm AR pistol--at least I have ammo for that!
The cmmg AR9 pistol is a delayed blow back. It is interesting how it works. The Bolt lugs are angled and gas key is deleted. That one may interest you.
You are correct. As far as I know they do use the buffer tube still.Those still use the buffer tube for the recoil spring dont they? So you cant shoot it while folded and you always have the length of the tube out back.
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