Troy BattleSights set the world standard for performance and durability. Now, Troy has developed a rugged low-profile sight designed for firearms with top rails higher than the standard M4. For shooters who favor a sightline that's as close to the barrel as possible, or for those with raised top rail systems, the Troy Micro BattleSight provides an ideal solution. Features : HK Style Front Sight Round Rear Aperture Sight Tritium Designed for Raised Top Rails