Will a KSC Elite metal slide fit the KSC M9?
 

I'm not sure of the exact dimensions. But for the KSC M9 Heavy Weight, correct me if I'm wrong, but I'm pretty sure that there aren't any aftermarket metal slides designed for it. I was seeing that there is a KSC Elite metal slide available. However, are they a completely different shape and won't fit one another or are they similar enough?

they fit

Yes, but I heard from somebody that you can't switch the sights because the rear sight on the KSC M9 isn't removable and it's basically impossible to find sights for Elite slides? can you confirm this? thanks.