Thread:Qwertyguns/@comment-11372347-20130701060706/@comment-4215180-20130701182035

If you refer to Chuc's post, you can find faction flags in the bottom right hand corner of each weapon

http://www.realitymod.com/forum/f196-pr-highlights/120517-1-0-weapon-feature-not-56k-friendly.html

The community modding and the ARF's faction showcase also provides a significant amount of information on weapons and assets.

Last of all, by playing the Beta! Or for your case, watching gameplay videos on Youtube might also do the trick.