Can you buy adjustable rear sights for a used Glock?

[bdjansen]

Title says it all. If I were to buy a used Glock could I get an adjustable rear sight and put it on? It isn't something I would have to send it to Glock to be done is it?

 

[ugaarguy]

Glock rear sights are easily installed with the proper tools. You can do it yourself with a brass punch, or have a dealer do it with a sight press. The sight presses result in a quicker, and usually a slightly cleaner, install.

 

[9x19]

There is nothing magical about the rear sight... drive out the old one, drive in the new one... use non-marring punches and all is fine.

There are sight pushers out there that can do the job easy as well.