The Burris SpeedBead Universal Vent Rib Mount transforms your shotgun into a precision hunting weapon by securely mounting FastFire Series Red Dots without any drilling or tapping required.Burris SpeedBead Universal Vent Rib MountNo drilling and tapping required for installationRib adapters included to fit multiple rib widthsRed-dot always centered to rib and gun with no left/right playComplete rib capture for full mount length stabilityBlack anodized aluminum construction protects gun finishBacked by unconditional Burris Forever WarrantyFastFire optics sold separatelyPerfect for faster target acquisition on clays waterfowl upland birds and turkeys this mount provides the precision and reliability serious hunters demand.