So I went and jumped before I looked
I bought an aftermarket slide discontinued by alpha wolf it's the Glock 21t slide 5". I figure hey I'll just buy a 5" barrel for it. Buzzzzzzzz! Wrong hehe. Nobody makes one and a.w discontinued the one they sold longtime ago. So I found Jarvis custom and they pretty much can cut to length.
Anybody on the forums have any experience with Jarvis.
And I hope the info coming out that the USPS might shutdown by June is b.s or I might never get my barrel. Jarvis customs states 2-3 weeks to make and ship out. But I heard that months can happen.