I purchased the NcSTAR Glock Disassembly & Front Sight Tool + Magazines Disassembly Tool to take the base plate off my glock magazines. It worked great, after I played around with it on the first magazine, the next two popped right off.
https://www.amazon.com/NcStar-VTGLMAG-Magpopper-Magazine-Disassembly/dp/B0742JNRCY
https://www.amazon.com/NcStar-VTGLMAG-Magpopper-Magazine-Disassembly/dp/B0742JNRCY