Extreme accuracy and muzzle velocity cause up to 18 layers of bloon to be popped per shot - enough to destroy an entire Ceramic Bloon!
~ BTD5 description
Erases 18 layers of bloon per shot - enough to destroy a ceramic.
~ BMC Mobile description
Deadly Precision is the 3rd upgrade for path 1 of the Sniper Monkey. With this upgrade, the sniper monkey can pop 18 layers of bloons at a time, sufficient to pop a whole Ceramic Bloon without health ramping (Ceramic layer pops in 10 hits, and there are 8 descendants). Since its firing speed isn't high, this would be a lot more effective when paired in groups. The purple beret now has changed to black.
The only problem about this tower is that other towers can destroy the Ceramics and release more bloons before the Sniper can attack the Ceramics due to the Sniper's slow attack speed, making the Sniper have to shoot multiple times instead of once.
If a Deadly Precision Sniper pops a M.O.A.B. by itself, then it will become 64 Blue Bloons rather than 4 Ceramic Bloons. The same thing occurs if it is upgraded to Cripple MOAB. 64 Blue Bloons are very hard to pop for Sniper Monkeys even with x/3. This can be prevented by letting the Sniper deal one hit with 0/0 upgrades, then upgrading it rapidly to 3/x or 4/x. Then, when the M.O.A.B. is popped, it will pop into 4 Ceramic Bloons, which the Sniper Monkey can pop much faster.