Working very well so far. There are a few modifications you have to make. This is NOT a drop in kit for the 10mm but it does work.

http://store.kriss-usa.com/accessories/magazines/magex-25-extension-kit-for-glock21-mag-ex-g30-extension-kit.html


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Thanks for the report  ...are those the Kriss adapters?

Yes, Kriss.