I just put a bunch of parts guns on the website. They are sold in batches of 4 and range from $199.95 to $249.95. They don't come with inserts or mags.
http://www.theammosource.com/index.php?main_page=index&cPath=2_29&sort=20a&page=2
http://www.theammosource.com/index.php?main_page=index&cPath=2_29&sort=20a&page=2
