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Posted: 2/10/2021 3:44:03 PM EDT
Greetings all,

I'm trying to research the viability of converting a Pak 9 to run 22 tcm 9r with a barrel swap. Hardware wise, it seems like it would mostly appear to be a barrel swap, with a 5.56 barrel blank chambered for 22 tcm 9r. 22 tcm 9r will feed from 9mm mags, and I think the bolt is close enough that it should also work. The only concern I have is chamber pressure. The tcm is loaded from factory around  40,000 psi, so it's higher that even 9mm +p. Would this be a potential safety issue with the Pak 9?
Link Posted: 2/10/2021 9:19:56 PM EDT
I wouldn't do that in a direct blowback - which the PAK9 seems to be.
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