If gen 4, the ejectors are different.
Whoa. Lot's of bad/incorrect info being given out on this thread. The ejectors are the same, the mags are different....well the followers are not the same. That being said, I interchange.40 and 357sig mags with zilch issues.
Sig and hk are identical in every way, except barrel. Glock not so, even though they will probably shoot fine without a change of the follower or ejector.Interesting on the differences!
I shoot .40SW, .357Sig, 10mm, 9x25 all with the same mags, slide, etc just change barrels in my Glock 20L. (Same deal with my Sig P226 and P229 with 40 and 357Sig). Depending on the load sometimes I need to dial in the recoil spring, but this is mainly because of the long slide.