Monstrum Slim Profile Series Cantilever Offset Dual Ring Picatinny Scope Mount w/ Quick Release Black 30 mm. Which is why we designed the Monstrum Tactical Slim Profile Series of mounts to be sleeker and lighter than ever. Crafted from lightweight 6061 aluminum the Monstrum Tactical Slim Profile Series Dual Ring Offset Scope Mount weighs in at a mere 5 ounces. At a weight comparable to a set of lightweight rings it provides the added rigidity and convenience of a one piece mount. The mount is built for standard 30 imm tube scopes for mounting to any standard Picatinny rail equipped rifle. The offset design provides an additional 2 inches of forward extension allowing extra flexibility for optimum eye relief and shooting position. The mount is 5.5 inches in total length. The base is 3 inches in total length. There is 2.5 inches of spacing between rings. The height between the top of the base to the bottom of the scope rings is 1 inch providing 1 inch of vertical clearance. Specifications for Monstrum Slim Profile Series Cantilever Offset Dual Ring Picatinny Scope Mount 30mm: Manufacturer: Monstrum Height: 1 in Gun Rail: Picatinny Fabric/Material: 6061 Aircraft Grade Aluminum Color: Black Tube Diameter: 30 mm Length: 5.5 in Included Accessories: Slim Profile Series Offset Picatinny Scope Mount Weight: 5 oz Gun Model: AR-15 Additional Features: Center Height - 1.6 in Center of Reticle to Top of Rifle Mount Condition: New Gun Type: Rifle Finish: Black Features of Monstrum Slim Profile Series Offset Dual Ring Picatinny Scope Mount 30mm Materials: 6061 Aircraft Grade Aluminum Compatibility: AR-15 Rifles with Picatinny rails Weight: 5.00 oz Diameter: 1.00 in or 30 mm Length: 5.50 in Base Length: 3.00 in Package Contents: Monstrum Slim Profile Series Offset Dual Ring Picatinny Scope Mount 30mm Includes: Slim Profile Series Offset Picatinny Scope Mount What firearm models does the manufacturer say Monstrum Slim Profile Series Cantilever Offset Dual Ring Picatinny Scope Mount 30mm is compatible with? The manufacturer says that Monstrum Slim Profile Series Cantilever Offset Dual Ring Picatinny Scope Mount 30mm is compatible with AR-15Monstrum ZR302-Q-B: Slim Profile Series Cantilever Offset Dual Ring Picatinny Scope Mount w/ Quick Release Black 30 mm