|This article is a stub. You can help Bloons Wiki by expanding it.|
|“||Added twin gun doubles attack speed.||”|
|~ Description from Bloons TD 5 and Bloons TD 6|
Twin Guns is the first upgrade on the second path for the Monkey Sub in BTD5 and the third path in BTD6. It adds a second gun to the sub, which enables it to fire twice as fast. This can be useful when used in combination with Barbed Darts because the sub now essentially has 6x the popping power of an unupgraded Monkey Sub.
- This upgrade is usually used as a stepping stone to the next upgrade, Airburst Darts.