Over 8,000 views.

Oh wow, over 5,000 views. I posted this so long ago. haha

I'm confused bu the button part. those blocks.... not sure where to put them because their placement doesen't look possible :/

Cool!

This is admittedly the first "double barrel" tnt cannon if you will. If i would suggest replacing the 2nd button with a delay system off of a second circuit activated by the first button so you don't have to guess-time when you press it. i dont know exactly how to wire it in this setup but my best delay is seven repeaters at full delay and an eighth at second fastest delay wired from the button to the tnt being shot.