AIM Sports Inc 3/4In High 5In Lomg Riser Mount Black Small Black Small. With 5 of rail space. Specifications for AIM Sports Inc AR Riser Mount: Manufacturer: AIM Sports Inc Color: Black Finish: Matte Gun Model: AR-15 Gun Type: Rifle Fabric/Material: Aircraft Grade Aluminum Length: 5 in Condition: New Gun Rail: Picatinny Features of AIM Sports Inc AR Riser Mount Accepts all standard Weaver / Picatinny 1913 accessories Lifts your mounting surface Perfect for lower 1/3rd co-witness with BUIS Package Contents: AIM Sports Inc AR Riser Mount AIM Sports Inc MT012M: 3/4In High 5In Lomg Riser Mount Black Small MT012M Black Small