Pair of Cantilever Flat Top AR Rings w/ Integrated 30mm ring and 1 Inch inserts- This forward offset mounting ring allows mounting of longer riflescopes on your flat top AR. The extra room provided by these rings allows you to align a riflescopes eyepiece directly above the charging handle. 6 heavy duty screws keep the optic in place and a large thumb lock screw keep the mount securely on firearm. -Rail Type: Picatinny/Weaver -Rail Length: 1.75 Inches -Material: T6 Aluminum -Warranty: One Year Limited.