[Taterhead]

I don't have that conversion barrel. I do suspect that the stock RSA would be just fine. Your gun will confirm that within a few magazines, I'd suspect. Me? I wouldn't swap the RSA until running a bunch of ammo with the new barrel and seeing if there is a need.

 

[Steven Walker]

I have a Gen3 Glock 20.
I just drop in my .357 SIG barrel, no issues and very accurate.
A blast to shoot.