Barska 30mm Picatinny Offset Ring w/ 1" Insert AI11720 is a versatile method of mounting flashlights, laser sights, and other accessories to your firearm. Mounting to any military standard Picatinny rail, these Barska rings are built in the offset position, making it possible to mount a laser or flashlight without it getting in the way of your rifle scope or red dot sight. The ring has a default 30mm diameter, but it also comes with a 1" insert for accessories with a 1" tube. The Barska Aluminum Picatinny Offset Mounting Ring quickly attaches and detaches from your rail with a sturdy thumb screw, and it can be positioned on either side of your firearm. Built out of aluminum, the ring is designed to last through many hunts and days on the range, and Barska has finished it with a non-reflective black matte coating. Mount flashlights and lasers of any size where they'll be out of the way with the Barska 30mm to 1in Picatinny Black Off-Set Ring.