I saw this posted a few years back & tried a newer SGM .45 hi cap mag. The SGM (Korea) 26 round .45 acp Glock mag can be used in the 10mm Glocks by pinching the feed lips. Compare feed lip spacing with the original mag (with rounds also to determine ammo feed angle). Start slow with channel locks pinching the front. Lastly, after testing the front, make a very slight pinch the rear. File or emery paper the rear plastic bulge over the metal liner so it can drop free.
The slower you pinch & test, the better ...
http://gunmagwarehouse.com/sgm-tact...m-luger-33-round-polymer-black-sgmt45g27.html (http://gunmagwarehouse.com/sgm-tact...m-luger-33-round-polymer-black-sgmt45g27.html)
Cool. Thanks for the link.
I have 4 of the kriss extenders. They work well too with just a bit of tweaking.