Includes: Slim Profile Series Offset Picatinny Scope Mount with Modular Red Dot Mount Materials: 6061 Aircraft Grade Aluminum Compatibility: Rifles with Picatinny rails Weight: 5.00 oz Diameter: 30 mm Length: 5 in Base Length: 3.00 in Color: Black Warranty:Lifetime Dual ring scope mount for 30 mm tube scopes tubes with integrated 45 degree canted micro red dot base. 45 degree offset base allows for mounting of secondary red dot sight or iron sights for use at closer ranges. Available with Docter footprint, RMR footprint, T1/T2 footprint, or picatinny red dot base. Please refer to the compatibility chart graphic before purchasing.