Pro Mag drum replacement is compatible with your Glock 17/G19. It is constructed of DuPont Zytel polymer with injection molded mag follower and mag spring formed from chrome silicone wire. Made in the USA.
Specifications:

Caliber	9mm Luger
Capacity	50
Finish	Black
Model	Drum Magazine
Material	Polymer
Type	Drum
Model Fit	G17/19
Brand Fit	Glock
Max Capacity	50