No-Upgrade-Limit Shooter

The No-Upgrade-Limit Shooter is a Tack Shooter-related tower that has infinite upgrades and one path. It will always be a stub, because it has infinite upgrades. It has 4 nozzles that shoot out 3 tacks each in a small spread. It costs $290 to deploy.

Faster Tack-Shots ($310)
Tacks are fired faster.

Even Faster Shots ($350)
Tacks are fired even faster, destroying a yellow in a second.

Double Nozzles ($800)
Now has 8 nozzles arranged in the same scheme as the Tack Shooter.

Burning Hot Tacks ($1650)
Tacks burn, being able to pop lead and ceramics in 1 hit.

Fire Spray ($2150)
Replaces all the 8 nozzles with 4 flamethrowers that pop bloons in its radius, creating a spray of fire in the cardinal directions.