Question: are glock 19 and 26 magazines interchangeable?
Answer: As far as subcompacts go, the Glock 26 has a lot going on for it. It's compact enough to be easily carried and concealed. ... It's also compatible with Glock 19 and Glock 17 magazines, so you can increase the capacity by swapping magazines. In fact, a lot of people carry a 26, but use a G19 magazine with a grip sleeve.