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|“||Increases sentry fire rate appreciably||”|
|~ in-game upgrade description|
Sprockets is a tier 3 upgrade for the Monkey Engineer's second upgrade path. It increases the attack speed for sentries and the Monkey Engineer's nail gun. By getting this upgrade, the tier 3 upgrade in the first path cannot be purchased. Sentries that belong to Engineers with Sprockets become SentrySprockets(named in BMC Flash only), if at least the Sentry Gun upgrade is bought.
- The official artwork has a mistake in it; the Engineer's helmet is red. At the same time, the Larger Service Area upgrade's official artwork has the black helmet from this upgrade.
- This upgrade also increases range, as it's notable under Monkey Village's influence.
- The BTD5 Artwork shows that she is showing her teeth angry similar to the Barbed Darts Monkey Sub and the Tribal Turtle (Standard Only, not Pro).
- Overclock Engineers' sentries in Bloons Monkey City Flash are still SentrySprockets.
- This upgrade dramatically increases the attack speed of Super Sentries if its Tier 4 Speciality Building is active.