.50 Caliber times 6

[CDF]

"Let me hear yer guns! I wanna hear what they sound like! Yang yang yang yang yang yang yang yang yang yang yang."

[oscardeuce]

The M-3 AC is built to spit out up to 1200 rounds per minute. $2/ round for quality blanks is not a bad price, maybe $1.50 if you roll your own. $14,000/minute to hear your guns!
Thinking in hours: $864,000 at $2/ round per hour for 6 guns. $1.15 million for your theoretical P-47 with 8 guns.
That's ammo only. No parts.
Add the $150,000 to buy 6 guns in the USA. Waits for the paperwork to clear the NFA are almost 6 months for each gun......
Ouch!

On the other hand always dreamed of putting mini guns back on my O2-A.

I forgot, how you gonna catch the spent cases to reload? I wonder what the FAA has to say about littering the ground with brass.

[Russ Matthews]

"Vaya con Dios, my friend .. to Hollywood and GLORY!!!"

http://youtu.be/_aQhCTC3zfA?t=2m24s

[Dragonflydh90]

Last time they fired at Wanaka it was over the non active end of the pyro pit so they could be collected later. They then sold off some of the brass to the show goers, Garth Hogan signed some of the shells.
The sound was interesting, not quite what I expected, it was much quieter but still very very cool.

[oscardeuce]

Some of the sound is expanding gas and some the supersonic bullet. That and the blank load probably explains the sound difference.