The new Meprolight FRBS sights are designed to fit MIL-STD-1913 Picatinny rails on AR systems and other weapons which utilize the Picatinny rails. The self-illuminated tritium back up sights maintain a low profile and are constructed from high-grade polymer and metal. Fixed with a spring-based locking mechanism, the FRBS won’t snap, weaken or break. They can be flipped into position without coming off the gun, allowing you to keep your eyes on the threat and in action under any lighting condition.
