On any Glock I acquire, I immediately swap out at least 3 parts:

1. I replace the factory sights with glow in the dark night sights.

2. I replace the factory slide stop with a Vickers Tactical slide stop. The factory one doesn't offer much of a "shelf" for the thumb to apply force.

https://www.vickerstactical.com/products.html

3. I replace the factory slide lock with a trapezoidal slide lock for essentially the same reason cited in 2 above.

https://www.tgrenterprises.com/product/glock-trapezoid-grip-slide-lock-for-glock-pistols/