- Feb 2, 2016
- 2,499
The .45 glock slide can also fit 10mm? The extractor works for both rounds?
"There are a minimum of three things you have to change out to convert the G21 to 10mm: the magazine, the barrel, and the recoil spring. The magazine is the easiest part — just use a stock G20 magazine. Because the Glock 20 and 21 frames are the same, the mag fits perfectly. " from:
https://www.thetruthaboutguns.com/frankenglock-10mm-45-glock-21/
For range work the above is all you need to do. For SD, perhaps change the ejector and extractor or just obtain a complete g20 slide, barrel and springs. I have never done this myself.