Glock models 21SF & 30SF: Are the magazines interchangeable?

Question

Glock models 21SF & 30SF: Are the magazines interchangeable?

Answer 1

yes, the snubby glock (in this case glock 30) can take the same mag as the full sized glock (in this case glock 21)

Note, the slimline glock cannot share mags with it's full-sized brother, so the Glock 36 cannot share magazines with anybody.