The Night Eyes NEBO PROTEC Light Mount with Rail System features an adjustable design that can accommodate 12-20 gauge shotguns, rifles and bow stabilizers. This lightweight, durable, and adjustable self-locking mount will fit both plain and vented shotgun barrels and will fit gun lights up to 1.25" in diameter. Will not work with the Night Eyes GL-300 gun light due to the size of the light. Features and BenefitsAircraft-grade anodized aluminum construction for light weight and durabilityAdjustable design with a side-positioned lever that adjusts and locks with no toolsSide accessory mounting rail allows for attachment of additional firearm accessories Protective rubber inserts protect your gun barrel and light when mountingThe barrel and light portion of the clamp will adjust from 20mm to 32mmIt can also be mounted to the shotgun magazine tube Night Eyes Nebo Protec Shotgun/Bow Light Mount