Should be just a straight barrel swap to change your G33 over to .40 cal and this will do it!
You would need to use the Lone Wolf Arms AlphaWolf Glock 27/33 9mm Conversion Barrel, found by using the link below:
https://www.opticsplanet.com/lone-wolf-alphawolf-glock-27-33-9mm-conversion-barrel.html
You need a whole G27 Upper.
In order to convert your Glock 27 to .22 cal, you would need the Advantage Arms Glock 26/27 .22 LR Conversion Kit, which can be found by using the link below:
https://www.opticsplanet.com/advantage-arms-glock-26-27-22-lr-conversion-kit-w-10-round-magazine-and-range-ba.html
Unfortunately, we do not carry any gold Glock 27 threaded barrels. We do have the threaded barrel version of this Lone Wolf Arms AlphaWolf Glock 27 .40 S&W Barrel in black that you can find using the following link:
https://www.opticsplanet.com/lone-wolf-alphawolf-9mm-threaded-barrel.html?_iv_gun-model=glock-27
Yes. The Lone Wolf Arms AlphaWolf Glock 27 .40 S&W Barrel is designed for 40 S&W with exacting tolerances to allow for drop in installation. This barrel fits all Glock 27 generations.
Absolutely, but you will need a couple more things for it to function 100%. Get some Glock 27 magazines, and you'll need to replace your G26 trigger housing with the trigger housing/ejector for the G27. MPN: GLSP01896
https://www.opticsplanet.com/glock-trigger-housing-w-ejector.html