The Meprolight Tru-Dot Suppressor High Sight Set features rapid target acquisition which is a critical component of defensive shooting. Designed by two highly experienced U.S. Special Forces veterans, the R4E Optimized Duty Sights have FIVE elements for sight alignment. Three vertical features and two horizontal lines which produce a reticle type sight picture that improves target acquisition time. Tritium enhanced lines on the rear sight help improve target acquisition in low light conditions. This design provides the ability to swiftly line up your sights to the target, which is vital to any shooter-especially law enforcement and defensive shooters. DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.