I noticed someone started the American Beauty page, so I helped out.
 

I had the movie, and enjoyed it, so I took screens of all the guns. I'm no good at identification though, if any of you guys who are better at it have time, could you check the page out and try to identify some of the guns?

You got a lot of them right. The gun you IDed as a P226, for instance, is correct. However, now the page needs links to the gun pages, as well as pictures of the guns.