the gun is stock upgraded...I dont have the list, but if you search on google, you'll see (SRC HK416)
have you guys have had any experience with MAG brand magazines, like those...
http://cgi.ebay.com/MAG-M4-M16-HK-Mi...742.m153.l1262
or are the King Arms brand better?
http://cgi.ebay.com/King-Arms-M4-M16...QQcmdZViewItem