Sorry, if this has been discussed, but I couldn't find it through search. On the Glock 21, 30, 36, and the SF and S variants, what mags are compatible with which model? In the 9mm Glocks, the 17 and 33 rounders can be used in all models. The 15 rounders in 19s and 26s. The 10 round from the 26 can only be used in the 26. What are the relationships in the .45acp models? TIA Wanna kill these ads? We can help!