
Here is the revised full auto, extra air line to the magazine tube keeps the ammo flowing better, it was stuttering as it was, 3 or 4 shots at a time.

I need a bigger air flow now to keep up, so will get a bigger reservoir tank. Laser sight is a cheap pointer of ebay ($1.50)
So total cost of this build, $1.50 + $3.00 for 100 balls.
Estimated rate of fire is 3000 rounds per minute, mag tube holds 50(1/4" steel ball bearings), I will video a 10 shot burst and get the time frame off media player in slow mo.
And I have parts for another one, I am thinking a short barrel pistol, single shot with pump action reload.