[IMightBeWrong]

Here is my personal guide to Glock mods:

Step 1: Take the stock gun out of the box and fire the heck out of it.

Step 2: Was it reliable?

If yes: Consider night sights and then leave it alone.

If no: Send it back to Glock, get it up and running again, and once it is consider night sights and then leave it alone.

Step 3: ????

Step 4: PROFIT!