Check the listing for details. OT Flip Up Iron Sights Flip Up Front Sight + Back Up Rear Sight. Condition: New. Listed at 17.99 USD. About this itemEasily pop up and fold up with Spring-loaded design. You can control it well with the push button.Windage and Elevation fully adjustable system for zero and targeting.Aircraft Aluminum Alloy Construction delivers durable and stable performance.Fits for 20mm Picatinny Weaver Rail. Comes with allen wrench.6-Month Warranty for Quality and Service Gurantee. If there is any quality problem, pls send us email and give us a chance to fix it.Specification:Color:BlackFinish:Anodized FinishMaterial:Aircraft Grade AluminumStandard 20 mm Picatinny Weaver Rail. A solid and durable piece of hardware.Package Include:1 x Front Flip-Up Sight1 x Rear Flip-Up Sight1 x Allen WrenchAbout this itemEasily pop up and fold up with Spring-loaded design. You can control it well with the push button.Windage and Elevation fully adjustable system for zero and targeting.Aircraft Aluminum Alloy Construction delivers durable and stable performance.Fits for 20mm Picatinny Weaver Rail. Comes with allen wrench.6-Month Warranty for Quality and Service Gurantee. If there is any quality problem, pls send us email and give us a chance to fix it.Specification:Color:BlackFinish:Anodized FinishMaterial:Aircraft Grade AluminumStandard 20 mm Picatinny Weaver Rail. A solid and durable piece of hardware.Package Include:1 x Front Flip-Up Sight1 x Rear Flip-Up Sight1 x Allen Wrench