Meprolight FRBS Flip-Up Backup Sights with Hyper-Bright Front Ring (Four Rear Lamps, Flat Dark Earth)

Equally useful as primary sights, the FRBS Flip-Up Backup Sights from Meprolight mount easily on your rifle's Picatinny rail and provide glowing tritium lamps for confident aiming. The four lamps in the rear sight and the one in the front, which is ringed by a Hyper-Bright fluorescent orange ring for daytime use, are always on, require no batteries, and are rated to last 12 years. The front sight can be adjusted for elevation with its finger-operable dial; windage adjusts on the rear side with a screwdriver or coin.