Bravo Company's BCM Gun Fighter's 1 inches Light Mount-KeyMod Version Mod 0 fits the majority of popular 1 inches round body tactical light systems. It is designed to mount on the 1:30 or 10:30 O'clock (upper 45 degree degree) rail positions. It's strong aluminum construction is intently designed to be low profile and snag free. Features: Minimal added weight - 1 oz Patent pending anchoring system Torx wrench included