Tier 3 upgrade
Double Gun
Double Gun (0-0-3) doubles the Engineer's fire rate to every 0.35 seconds. A strong early carry for saving up, plus double-shot sentries.
Two guns for twice the fun.
Oversize Nails
Pin
Double Gun
Bloon Trap
XXXL Trap
Stats
Main attack
- Damage
- 1
- Pierce
- 8
- Attack speed
- 0.35s
- Range
- 40
How to use Double Gun
Double Gun gives the Engineer a second gun, halving its attack cooldown so it fires every 0.35 seconds, alternating between the two barrels. With the Sentry Gun crosspath, sentries also fire two projectiles side by side.
When to buy it
Double Gun is a very efficient early carry. On maps with a single lane per round, its fast fire, decent pierce and pinning from Pin can hold through the 20s, which lets you save for an expensive early purchase such as Captain Churchill.
- 0-0-3 is the cheapest and the best for early saveups.
- 2-0-3 gets the most damage thanks to double-shot sentries.
- 0-2-3 is better if you plan to go to Bloon Trap or XXXL Trap.
It falls off going into the mid-game because it struggles with Ceramics and its pierce runs short.
Is it worth it?
Yes, as an early-game tower and the route to the trap upgrades. Do not expect it to carry past the early 30s.
Frequently asked questions
How fast does Double Gun shoot?
Every 0.35 seconds, twice as fast as the base Engineer.
How much does Double Gun cost?
$450 on Medium. The page lists all difficulty prices.
What crosspath for Double Gun?
0-0-3 for the cheapest early carry, 2-0-3 for damage, 0-2-3 when heading to Bloon Trap.

















