Compatible with all generations – Glock Gen 1, 2, 3, 4 and 5.
Currently available in 9mm only.

15 Round fits flush in the Glock 19, will also work in Glock 26 
17 Round fits flush in Glock 17, will also work in Glock 19 & 26
33 Round sticks out of all Glock frames but will fit and function in all 9mm Glock handguns.