The Bolter is a 2x2 weapon room unlocked at level two. It's the second weapon unlocked in-game and the only weapon room that consumes a maximum of one power. This one power makes it infamous because it makes the Bolter quite easy to destroy, allowing the enemy to deal easy hull damage.
The Bolter is quite inexpensive, consuming one power and little space. However, the Bolter's one power consumption is its biggest weakness. One power with such little Crew space makes it quite easy to destroy and lockdown (Damage surpasses Repair rate). This can allow the enemy to deal massive hull damage quite easily. Thus, Armor the Bolter as much as possible.
When To Use
The Bolter is mainly suited towards early level players. When starting out, the extra firepower is incredibly important for taking down enemy ships. However, some players begin to eliminate the Bolter to reduce vulnerability as early as ship level 5, and most players replace it with the Plasma Discharger by ship level 7. Bolters do see some usage in level 11 ships for extra DPS, but it's only because those ships can deal with the Bolter's vulnerabilities.