The file 'Glock17/18 Mag Bumper 3D Printer Model' is (stl) file type, size is 71.5KB.
Modified this as they would slide off to easily. Now stays on the bottom of the mag much better.
Here's the origonal:
https://www.thingiverse.com/thing:4876411
Glock_Mag_Bumper_Fixed_v3.stl | 171.2KB |