A rearview device for a vehicle includes a rearview device head, a rearview device base including a base frame, and a detent assembly which is configured to control rotation of the rearview device head with respect to the rearview device base. The detent assembly is configured to lock and unlock rotation of the rearview device head with respect to the rearview device base without vertical movement of the rearview device head with respect to the rearview device base.