A firearm pin assembly is provided. A firearm pin may have a substantially cylindrical member with a lever on one end and a track running along its side. The track may run helically for a portion of its path. The track may also have at least one dimple disposed within its path. The firearm pin assembly may have an aperture for installing a detent and detent spring. The firearm pin assembly may be used in any firearm, including but not limited to a takedown pin and pivot pin assembly in an AR-15 style rifle.