SME Laser Bore Sighting System 222 Remington and 223 Remington - Get meticulous accuracy with the most exacting tolerance specifications in the sighting industry. Sight-Rite is SME's precision machined caliber specific sighter that delivers unparalleled results. It is precision machined from brass casing for optimum accuracy and has a high output laser. Included are three (3) button cell batteries.