Here is the gun i have been building over the last couple of days. i think it has worked out well, and have built it acurately.
I did have a few minor concerns with it, although i quickly moved from these after making a simple soloution. i made the top section of the gun first and then worked my way down, (inserting edge loops) where the pistol was built of different sections. E.g, the trigger, lower nozzle, and the handle.