Solely calibered for rimfire cartridges, the No. 4 is the smallest of the rolling block rifles and is easily identified by its unique mounting screws. In the Remington rolling block action, the hammer serves to lock the breech closed at the moment of firing, and the block prevents the hammer from falling with the breech open. This rifle features adjustable Buckhorn sights. Its wood, metal, and bore are all in very good condition.