stingray656667 Posted January 6, 2019 Report Share Posted January 6, 2019 Hello, I've heard the term full auto chamber and semi auto chamber mentioned as related to a Thompson but I don't know what the difference is. Is there a way to visually determine which is which? Please clarify the difference between a FA chamber and a SA chamber. Thank you. Joe Link to comment Share on other sites More sharing options...
StrangeRanger Posted January 7, 2019 Report Share Posted January 7, 2019 AFAIK military chambers are ever so slightly larger than SAAMI (i.e. civilian) chambers. Link to comment Share on other sites More sharing options...
PK. Posted January 7, 2019 Report Share Posted January 7, 2019 The GI chamber is ~.01 larger diameter at the rear Link to comment Share on other sites More sharing options...
NFA amnesty Posted January 8, 2019 Report Share Posted January 8, 2019 (edited) Posted Today, 06:44 AMThe GI chamber is ~.01 larger diameter at the rear Hey, did not know GI's have big rears! Edited January 8, 2019 by NFA amnesty Link to comment Share on other sites More sharing options...
ppgcowboy Posted January 8, 2019 Report Share Posted January 8, 2019 Not big just larger. Link to comment Share on other sites More sharing options...
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