In one general aspect, the subject matter described in this specification can be embodied in a firearm safety device including a trigger, a pin, and a safety deactuation device. The trigger has a channel therein with an opening at an end of the channel. The pin is disposed within the channel such that a portion of the pin extends through the opening. The safety deactuation device is configured to engage with the pin and move the pin within the channel of the trigger as the safety deactuation device is moved relative to the trigger.