Base platform: G21SF.
Is just a new OEM barrel enough? Stronger recoil spring? Will the barrel work in the .45 slide? Extractor change?
Easiest would be simply buying a G20. Second easiest (and a bit cheaper too) would be just buying a 20SF slide (complete) but, like just about everything else…SOLD OUT. So if it’s doable I may have to piece the necessary stuff together, hence my questions above.
Thanks for the help fellas!
I went the other way. I bought a used, complete 21 slide and some magazines. I just swap slides with the 20 and it is GTG with everything else. My slide was a police trade in and was very cheap. Probably not the case now. When I was looking into this I read about a problem with the breech face dimensions between the .45 and the 10mm. About the same time I found my slide for 300 bucks and just bought it.
Following for interest and more info…
May want to read this. https://www.glocktalk.com/threads/glock-21sf-to-10mm-conversion-questions.1552479/
Thanks for the link. If I could find a G20 slide (and mags of course) that would just about solve it 100%.
BTW, a G20 slide should fit on a 21SF frame shouldn’t it?
Yes. The ejector is the same for both 10mm and .45.
I went the other way when I built my Gen 4 30S since it’s not a catalog item. I bought a Gen 4 Model 29 (10mm) bottom end and a G36 top. Works like a champ over thousands of rounds.
What’s fun is when you buy the used slide (complete) and a used frame as separate purchases. Then you can end up with a perfectly legal and reliable pistol which has 3 different serial numbers, if those parts came from Austria. Naturally only one s/n counts with the serial number bookkeeping but it is a bit of a novelty.
Bart Noir