[rdl]

gunbroker.com is a pretty decent online weapons market. I use it quite frequently (in full compliance with state and federal law).

[noahc]

If you're interested in this type of thing:

http://www.collectorsfirearms.com/ -- Mostly Military and Older Weaponry.

http://www.aimsurplus.com/default.aspx -- C&R, Military and Black Rifles

http://www.budsgunshop.com/catalog/index.php -- Modern Firearms from almost all medium and large manufactures

http://www.cdnninvestments.com/ -- Whole sale gun catolog.

[rdl]

http://www.slickguns.com is also a great "daily deals" site for guns and ammo.

Other good cheap vendors (in addition to the above) are http://www.jgsales.com and for ammo, http://www.ammoman.com/ and http://www.luckygunner.com/