TufForce 1" Tube/Barrel Mount, 9 Slots, with 2 Ring Clamping on 1 inch Scope / 1" Barrel or 1" Shotgun Magazine Tube, Item # MT-25T9 Fit for 1" Scope Tubes / Barrel / Mag. tube, Such as Remington, Mossberg 500, 835, Maverick 88, Winchester 1300, Browning ..... include Rib Shotgun barrel ...... ATTENTION : make sure the diameter of tube/barrel is 1", if it is less than 1" you can try to add spacer at your own risk 9 slots, 95mm/ 4" length, Just 2 screws tighten / mounted on tube at Any Angle for Laser or Small Accessory Attached on scope tube, shot gun Barrel or Mag. tube Precision Machined Out of Premium 6061 Aircraft Aluminum; Black Hard Anodized Finish