Check the listing for details. 3Slot Tactical Rail Base QD Mount Lockdown Riser 20mm Picatinny Weaver Adapter. Condition: New. Listed at 13.99 USD. Product Description Description: Condition: Brand New Material: Aluminum Alloy Color: Black Top Rail:20mm Dovetail Rail:20mm Features: Picatinny riser mount for use with Picatinny or Weaver base optics 45 degree forward extending riser mount for mini red dot sight Fits 20mm Weaver and Picatinny Rails with 3 ring slots Lenght: 1.75 inches, Rise Height: 1 inches Single piece machined aluminum design to reduce weight Package: 1x Quick Release Mount Lifetime After-sales Services: We provide Lifetime After-sales Services. If the product you received has any defects or is not satisfied. You can choose to replace it with a brand new knife or request a full refund. If you have any other questions, please feel free to contact us.