Semi-automatic Cannon

This is a Semi-auto cannon I designed and created by myself. as of right now the range isnt that great but the idea is solid. I'm going to modify it from here to make it shoot farther, and I'm even working on a full auto cannon. but for now this is it. This is completly my design, now im not saying its the first time its been done but I've never seen it.

Operation:
- at first the cannon comes fully loaded
- press the button on the ground to fire.
- wait till u hear the pistons activate and deactivate.
- then repeat.
To Reload:
- clear cannon of all sand
- go to the top of the cannon and place tnt in the mag then press the load button to push the tnt through
- then repeat until tnt fills the cannon
- place 4 pieces of sand on the tnt
- go to Operation and repeat process

Things to come
Longer Range
Fully automatic