Semi-automatic TNT cannon with dispenser-loaded charges.
Weapon uses Redstone Repeaters for sequenced TNT activation.
Firing consists of 3 stages: compressor charge (first TNT deployment, 4 charges), main charge (propellant 7x2 charges), and projectile (single TNT charge).
Maximum attainable projectile range is estimated at over 200 blocks. Note that the projectile often doe not reach this because it detonates before it lands.
Can be burst fired, but not recommended as it easily falls out of sync.