Made a few guns myself as well. Kind of fun trying to make weird guns. Considering I barely know how they work.

Some Handgun I guess.
 [img=http://fc08.deviantart.net/fs71/f/2014/206/a/c/handgun_by_vatrou-d7s68hu.jpg]

And a M79 that I tried to piece together. 
[img=http://fc08.deviantart.net/fs70/f/2014/284/9/e/m79_prototype_by_vatrou-d82hdhr.jpg]