Glock Forum
Ive seen that 15 rd. Mag's .40 and the SIG followers are identical. I prefer my 31 over my 22 for bedsidee duty.
I changed out the follower on a few of my 22 round .40 magazines to a .357 follower.
There appears to be a difference in appearance in the hi cap Mag's. Haven't been to the range...