First of all, I'd like to say that I am not done and/or haven't given up on the FBBLR. It's just that I haven't been able to work on it (the end of the year gets so busy...) and these ideas just keep popping into my head.

So, I came up with the idea for "The Viper"

Basically, it's a compressed-air powered, nearly semi-auto Maverick.
The pressurized air storage chamber will hold enough air for 6 shots. This air will be allowed into the pressure chamber (p. chamber) a bit at a time by the ball valve. So, I'll fill the p. chamber by opening the ball valve, close the ball valve, shoot, fill the p. chamber, close the ball valve, shoot, etc.
Hopefully, I can also connect a pump directly to the p. chamber, thus allowing me to ready a single shot. I'll probably rely on this, and keep the air in the storage chamber for "emergencies," such as rushes.
The air pressure will be released by an electrically operated solenoid valve. It will be opened when the contacts are pushed together by pulling the trigger. It works similarly to how the Nitefinder light lights up when you pull the trigger.
The turret will still rotate when the trigger is pulled, but in order to have the extended barrels I will need to do CaptainSlug's Maverick End-Clip mod(as seen here:
http://nerfhaven.com/forums/index.php?showtopic=6272)
Unfortunately, this mod keeps me from having the very awesome swing-out cylinder. Maybe I'll try a slightly altered mod, or maybe I'll just learn to live with it. The batteries will probably not be directly attached to the pressurized air storage chamber, because I would really like to have interchangeable air storage chambers to go along with the cylinder-clip.
PS: Isn't Top Gun a cool movie? I wish I had a cool callsign like those guys...