The Keltec CP33 is a polymer frame .22lr. The rear sight is a red fiber optic that is adjustable and the front sight is a green fiber optic dot. The full length picatinny rail allows the shooter to choose exactly where they would like to mount their optic. The M Lok slot on the bottom of the frame allows for mounting of a flashlight or laser. The magazine holds 33 rounds of .22LR and is able to do so because of its quad stack design.