TruGlo Universal Shotgun Rib Mounts Black 4-Post Mounting System TGTG8954U1

Designed to mount a dot-optic to shotgun ventilated rib - Fits 0.236 in. (6mm) to 0.395 in. (10mm) ventilated ribs width - Optic stays with the barrel and maintains zero when changing barrels for different seasons - Mounting hardware and tools included - Rigid two-clamp mounting system - Allows optic to sit low on the rib