Includes: Defcon Series Cantilever Scope Mount Materials: 6061 Aircraft Grade Aluminum Compatibility: Rifles with Picatinny rails Weight: 8 oz Diameter: 1 in, 30mm Length: 6i n Centerline Height: 1.5 in Ring Spacing: 3 in Color: Black Warranty:Lifetime Transform your rifle in an instant! With the Monstrum Defcon QD Scope Mount with Hypergrip Quick Detach, you can quickly swap out your optic to meet the needs of any situation. The Defcon QD is a dual ring scope mount with a one inch forward offset allowing for flexible placement of your preferred optic.