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ugh, that guy again?
how many rifle buffer tubes do you see on pistols?A buffer tube becomes a stock when you shoulder it. Same rule applied to pistol buffer tubes, except a rifle buffer tube can accept a stock which was always seen as a bad idea because law enforcement can say ‘it’s capable of accepting a stock so NFA and u registered. Go to jail.’
I've never even seen a pic of one, plenty of carbine tubes though