help with adjust rear sight

[123what]

I've looked all over the Internet and I can't find official instructions on how to adjust glock rear sight anywhere. It [Illooks like/I] you just take a punch and lightly tap them in the appropriate direction but before I take a hammer to my gun I thought I'd better ask.
To clarify this is a Gen 4 Glock 19 with factory sights and absolutely NO modifications of any kind. I'm pretty sure the sights are polymer.

Thanks

[billc]

They make a tool, best I can discribe is kind'a like a c-clamp, to adjust the sights. I don't do Glocks so I don't know if you have to adjust the front or rear sight (some only adjust on the front) also some only can drift one direction. Since you are asking about the rear sight, did you look at Brownells, Midway, etc. for tools and instructions?