I found your Forum 3 days ago and can't shut you off. I'm not sure to post this here or in the SMG section since mine is 45 years old. I have a WH 1927A1 that was manufactured in 1977. I would like to convert it to a SBR. My big question is the barrel replacement. I'll be going with the 10.5 barrel with the radius fins and threaded for the Cutts comp. So far I've only found 2 places to get the barrel I want: thompsonbarrels@yahoo a gentleman name Dave or ima-usa.com. So many posts on after market crap from all sides of the spectrum is makimg me dizzy. Anybody familiar when either one ? Here in Southern Nevada I haven't found any Thompson enthusiasts that can answer any of my questions. I adore my Tommy but want it as close to an original as possible. I will be shooting it when it is a SBR. Form 1 has been submitted. Thax ahead of time for any opinions. Chudi