AT3 Tactical RCO Riser Mount for MRO Pattern Optics Hardcoat Anodizing Black. The AT3 RCO Riser mount makes it simple to get the height you need whether you want to set up for absolute or lower 1/3 cowitness. This is a complete kit featuring a cantilever riser mount a height spacer all necessary screws and a Torx wrench so you can optimize your MRO. Specifications for AT3 Tactical RCO Riser Mount for MRO Pattern Optics: Manufacturer: AT3 Tactical Color: Black Finish: Anodized Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Fabric/Material: 6061-T6 Aluminum Red Dot Sights-Footprint: MRO Attachment Type: Picatinny Optic Cut: Not Applicable Hand: Ambidextrous Length: 2.6 in Height: 1.41 in Weight: 1.1 oz Condition: New Mount Type: Picatinny Features of AT3 Tactical RCO Riser Mount for MRO Pattern Optics A cantilever riser mount offers extra benefits for usability over standard block-style risers. The forward angle pushes the MRO red dot further from your eye aiding on focusing your vision down the sight tube making target acquisition simpler. The skeletonized design is durable lightweight and modular all at a price well below most other aftermarket options. Plus its backed by the AT3 Lifetime Warranty. Package Contents: AT3 Tactical RCO Riser Mount for MRO Pattern Optics Mounting Screws Allen Wrench AT3 Tactical AT3-RCO-RM: RCO Riser Mount for MRO Pattern Optics Hardcoat Anodizing Black