I've often wondered if tfu.info or one of those sites would be interested in having an "ID your unknown gun/component" section similar to the "ID your transformer by colour/altmode" database.

Choose the component by type (gun/missile/other), colour(s) and/or approximate length along major axis. Result is a display of all known components which roughly fit the given specs.

Even if it was only guns and missiles, it'd be pretty useful.