This is a single Barska Cantilever flat top AR ring designed for a 30mm tube diameter scope, and also comes with the 1" inserts in case you have a 1" tube diameter scope. These rings feature a forward offset mounting ring which allows you to mount a longer riflescope on your flat top AR. The mounts comes with 6 heavy duty screws that keep the optic in place and a large thumb lock screw keep the mount securely attached to firearm.

Specifications and Features:
Barska AW11451
30mm Ring with 1" Inserts
Picatinny/Weaver Rail
Single Ring
T6 Aluminum
Matte Black