Is this out yet officially? I made my own using a G26/G4 lower with a G27/33 trigger housing/extractor, G27/G3 slide and mags, and an OEM G33 barrel. It works great. I never liked the gen 3 G33 all that much when I rented one, but with the gen4 grip I like it quite a bit. I might be a convert. I also have a G31 barrel I use in my G22/G4. I wish the G32/G4 I ordered in Feb would get here.