Glock 19 Spring Adapter: This allows you to use Gen 3-4 springs with Gen 5 Glock slides. This may be necessary if you're swapping Gen parts or using printed frames. I printed mine out of PLA on a Bambu X1C. However, you’ll want higher temperature resistance, as I expect PLA to fail. If PLA does fail, I'll switch to nylon. That being said, nylon, ASA, ABS, and maybe PETG should work depending on how hot you're running. 

The model is also in STEP format so if your spring is a bit different it should be easy to modify.