This is my Masterdude Hand Cannon model 1 (MHC-1). It is a gun which works on a trigger system derived from my semi-auto series. It shoots rather large projectiles at a good range and strength, while having a short barrel making it easy to carry. This is due to the wheels in front which let you pull the rubberband back in the other direction, and effectively cuts down the barrel length.

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Pros:

Semi-auto
Strong
True trigger & trigger guard
Large ammo (image 4)
Compact (-ish for a cannon like gun)
Magazine
Safety
Side grip

Cons:

Low mag size (4)
Longer reload

Images 1-2: Side views
Image 3: FPS view
Image 4: Ammo

Step 1: Components

Make the following:

Image 1: Make 2.(Part A)
Image 2: Make 2.(Part B)
Image 3: Make 2.(Part C)
Image 4: Make 3.(Part D)
Image 5: Make 3.(Part E)
Image 6: Make 3.(Part F)
Image 7: Make 1.(Part G)
Image 8: Make 1.(Part H)
Image 9: Make 1.(Ammo Pusher)

Step 2: Construction

Follow the instructions:

Image 1: Add blue, yellow, red rods, and blue spacers to Parts A & B.
Image 2: Add Parts C, D, E, & F, and white rods, and red and gray connectors.
Image 3: Add Parts D, E, F, G, & H, and a red and gray connector.
Image 4: Add Parts C, D, E, & F, and red and gray connectors, and a blue spacer.
Image 5: Add Part A and blue spacers.
Image 6: Add Part B, a wheel (no tire), small gear, tan clip, red connector with white rod, and white connector.
Image 7: Add gray connectors, and red connector with white rod.
Image 8: Alternate adding white and gray connectors to form a side grip as shown.
Image 9: Add small gear, wheel (no tire), gray connectors, and metallic blue clip.
Image 10: Add gray connector.

Step 3: Operation

First hook the rubberbands on the rubberband hook under the barrel, pass them over the wheel, through the ammo feed, and on the trigger spoke (image 2). Then insert the ammo (image 1), followed by the ammo pusher which you made earlier in the mag. Then attach the rubberband to the ammo pusher as in (image 2). lift trigger up to engage the trigger, and pull trigger to fire.

Warning- This may cause harm or injury if misused. Do not point it at people. I am not responsible for damage, injury, or death caused by this instructable. Even with safety engaged it can fire. Always treated it as armed.