This is a huge, bulky, difficult-to-use Giant ferris-wheel-turned-gatling-gun.
it does, however, fire at a massive 2000 or more rpm. Yes, 25 bullets in under a second.

This instructable is made in 3 main parts: the wheel, the frame, and the barrels.

Be warned, as this gun requires a huge amount of pieces!

Step 1: The Wheel, Part 1

A pretty easy step.
Pieces:
50 blue 3d connectors
50 purple 3d connectors
73 white rods
2 Green rods

Make 24 of pic. 2 and 1 of pic 3.

Step 2: The Wheel, Part 2

An even easier step
Pieces:
48 gray rods
1 black rod
6 White connectors
2 silver spacers
2 Brown tabbed connectors
2 blue spacers
1 Commando connector

Step 3: The Wheel, Part 3

Connect the 2 parts of the wheel. you should now have a ferris wheel about 2 feet in diameter.

Step 4: The Frame, Part 1

The first part of the frame: a tower

Step 5: The Frame, Part 2

The second parts of the frame: two supports

Step 6: The Frame, Part 3

The third part: the motor cage

Step 7: The Frame, Part 4

The fourth part: the bottom piece

Step 8: The Frame, Part 5

the Fifth part, another tower

Step 9: The Frame, Part 6

The sixth part: the wheel supporter

Step 10: The Frame, Part 7

The Other Tower

Step 11: The Frame, Part 8

The Top Part

Step 12: The Frame, Part 9 (Assembly)

Assembe Steps 1-11

Step 13: The Barrels, Part 1

Build 25 of these Babies

Pieces: per barrel
8 Gray connectors
3 orange connectors
~2 rubberbands
2 Light gray connectors
2 Brown connectors
1 white rod
1 blue rod
1 gray rod
2 red rods
3 silver spacers
1 blue spacer
Total: 26 pieces

200 Gray connectors
75 orange connectors
~50 rubberbands
50 Light gray connectors
25 white rods
25 blue rod
25 gray rod
50 red rods
75 silver spacers
25 blue spacer

Total: 650 Pieces