Correct. There is a well known list of conversions that are possible and several that are not. Shooting .45 in guns that were originally 10MM is one that can't be done.Sounds like the answer is no. All those other posts came in while I was typing.
i believe a 29sf is in my future and thought it would be nice if it was a barrel change only. for that price i would just buy the other gun.The other option that hasn't been discussed is a complete upper swap of the OEM slide from a 10mm pistol to a .45 ACP pistol frame, or vice versa.
In the case of Glock .45 ACP (G21/G30) and 10mm (G20/G29) caliber conversions, the standard frame G21, G20, G30, and G29 pistols all share the same trigger housing and ejector. The short frame G21SF, G20SF, G30SF, and G29SF also all share a common trigger housing and ejector, although different from the previously mentioned standard frame pistols.
Therefore, just a complete upper swap between a G21 and G20, G30 and G29, G21SF and G20SF, or G30SF and G29SF together with a mag change should be good to go.
A complete upper (slide with internals) retails for $360, so the option is not much less than the cost of a complete pistol. Although not the most economical, it's good to know the option exists, especially since it also solves any issues between the extractors for the two calibers.
That's my understanding too. The 8196-2 ejector is in all of the .45ACP and 10mm standard frame and short frame versions of the G21, G20, G30, and G29 (eight models total). The difference between the standard and short frame internals are with the two versions of the trigger housing.The trigger housings are slightly different but the ejectors on the 10mm and 45's are the same
I don't expect a problem for complete upper swaps between short frame and standard frame pistols, for example; G21SF and G20, G21 and G20SF, G30SF and G29, or G30 and G29SF. Just be aware that swaps of this type combine a slide atop a trigger housing that normally don't appear together in a OEM pistol configuration.I put my G30 slide on my 29SF and it works fine. The internals are the same except for the trigger housing.