For the 9/40 frames and the .45/10 frames are there TWO different Glock factory ext. slide stops? Or is it just the two and three pin ones for the older and newer guns? How about the SF guns? I went to swap out the parts in my new G21SF this afternoon and realized the ext slide stop levers I had on hand only read "9/40 guns"? Can't tell if it's my mistake for how I marked their container, or if there are two different size ones? Glockmeister shows one for the 9/40 and one for the 45/10 (again, factory parts), Lone Wolf does not? I don't remember ordering a different one for my older G21 I still have, vs. the ones I have order for my recent 9/40 guns, and I don't remember ordering a different one last year when I bought my G30SF I no longer have? I just need to make sure I got the right one in both my G21 and my new G21SF. Thanks - Anyone got a PDF of the parts and part numbers that work in which models across the board and which do not?