Yes, the internal specs are the same as Gen 3 Glock frames and TacSol states their kits work with Gen 1-4 Glock frames.
I actually tried this and no it won’t work. Works great with my g17 upper but not my tactical solution upper
Just put 500 rounds through my TacSol and Advantage Arms on a Poly80 frame over the last 2 days. Ordered another frame so I can have one for each slide. It took some fitting and lots of racking to get them broke in but they work great now. Better than on my Glock frame. Only problem I've had is I can't load more than 10 rounds or I get feed issues....no matter what frame I put them on.
I just built one today put tac/sol conversion on p 80 frame wanted a whole pistol instead of conversion haven't fired it yet been wresting with it all day seems to function ok except slide stop won't pull down to remove the slide gonna have to take closer look next time i sit down to work on it
I was just told by TacSol their kits are made for GLOCK frame grips only