Sprays out 16 tacks per volley instead of the usual 8.
~ BTD5 description
The Tack Sprayer is the third upgrade of Path 1 for the Tack Shooter in Bloons TD 5, costing $425 on Easy, $500 on Medium, $540 on Hard and $600 on Impoppable. Instead of 8 tacks shooting out, it shoots out 16 tacks, making it more powerful than before and pops more bloons too, allowing less bloons to sneak through defences.
A Tack Sprayer and a Blade Shooter can pop 16 bloons per shot even though Tack Sprayer upgrade is cheaper. However, it fires slower than a Blade Shooter.
Tack Sprayer upgrade icon shows only 12 tacks instead of 16.
This upgrade is more efficient paired with third and fourth level in Tack Research Center and other extra pierce boosts in Monkey Knowledge; this is because that more projectiles gain the extra pierce while there are lesser Blade Shooter's blades that gain the boosts.