TROY Industries BattleSight, Fixed Front Sight, HK Style, Picatinny, Black Finish SSIG-FBS-FHBT-03 Durability and dead-on accuracy make Troy BattleSights(TM) the hands-down first choice of Special Ops and Tactical Users Worldwide. Troy's HK Front Fixed BattleSight" a permanent" rail-mounted alternative to a standard A2 sight" allows limitless mounting options on all-length rails with a serrated ramp.