Am trying to fine out if the 10round mags I have for my 226 legion will fit in a 226 xfive legion. Am thinking of picking up the xfive

All p226 mags should work in the p226 x5s. The only hiccup may be if there is a magwell, but i am pretty sure they should still work even with a magwell. My x5 is of german origin so not 100% on the newer american ones, but it looks like all should be good.

Yes they do. I have a P226 Sport that uses standard P226 magazines. In fact, it’s a 10 round mag from the ban. Fits fine in my P226 X-Five Legion