The 10/22 comes with open/iron sights (which may or may not have fiber optic inserts -- used to make it easier to see the sights in low-light conditions). The top of the receiver is drilled and tapped to allow the installation of a mounting rail. The rail will allow the installation...
An 11" Picatinny rail runs along the top of this firearm. From the factory, it comes with low profile sights including a rear sight with four different aperture sizes, but you could also mount ared dot sightor holographic sight. There are also Picatinny rails on the front sides and bottom...