GrovTec US Side Rider Mount w/Push Button Base Black. Low profile mounting system sits below sight-line of optics. Specifications for GrovTec US Side Rider Mount w/Push Button Base: Manufacturer: GrovTec US Color: Black Fabric/Material: Aluminum Finish: Type III Hard Anodized Features of GrovTec US Side Rider Sling Mount Designed for a sling mount on the top rail of a handguard. Low Profile mounting system sits below sight-line of optics. Package Contents: GrovTec US Side Rider Mount w/Push Button Base GrovTec US GTSW322: Side Rider Mount w/Push Button Base Black