Sooo, hello, it's eumeL.
First of all, I'm totally new in designing. I've never used programs like Autodesk.
BUT!
I had a, in my opinion, good idea for a new Sentrygun, so here it is:
http://img714.imageshack.us/img714/8317/theflack.jpg
Yeah...
I thought it might be cool if theres a SG wich you use for great distances, like Capturepoints or so.