Includes: High Performance Offset Dual Ring Scope Mount, Hardware. Materials: 6061 Aircraft Grade Aluminum Compatibility: AR-15, Rifles with Picatinny rails Weight: 4.3 ounces Diameter: 1.00 in Length: 5.75 in Base Length: 3.00 in Color: Black Warranty: Lifetime One size does not fit all.That's why we designed the Monstrum Extended Series Scope Mounts. The Monstrum Extended Series Scope Mounts are built specifically for long range scopes - 6-24x magnification scopes and above - with longer dimensions and larger adjustment housing. With wider spacing between the two scope rings, the Extended Series Scope Mounts can accommodate scopes with larger segments that will not fit into standard one piece scope mounts.The mount is built for standard 1 inch tube scopes for mounting to any standard Picatinny rail equipped rifle.The mount base mechanism comes equipped with custom Picatinny locking bolts that slot seamlessly into your Picatinny rail with zero wiggle - holds zero against the toughest of recoil. The mount frame is crafted from lightweight 6061 grade aluminum with hardened steel Torx mounting hardware to prevent stripping of the bolts. A 30mm tube diameter version is available here.