GrovTec US Flanged Push Button Base Non Rotating M-LOK Black. The full rotation design of these Swivels and Bases by GrovTec US allow for quick detach mounting on M-LOK handguards and they are built tough with a Type-III black anodized finish. The GrovTec US Flanged Push Button Base Full Rotation M-LOK Attachment easily installs using the hex screws and Allen wrench provided. This base was specifically designed for use with the popular Rifle Scope which has a rear swivel notch that allows for push-button detachment. If you use a Rifle Scope you need to use a GrovTec US Rifle Scope Mount with the Rifle Scope to get the correct arc and rotation. This GrovTec US product serves as a great base for those seeking to attach a Rifle Scope or light to their handguards and there's no better place to get the job done than with the GrovTec US Flanged Push Button Base Full Rotation M-LOK. Specifications for GrovTec US Flanged Push Button Base: Manufacturer: GrovTec US Color: Black Fabric/Material: Aluminum Finish: Type III Hard Anodized Features of GrovTec US Flanged Push Button Base Mounts a push button to an M-Lok forearm. Package Contents: GrovTec US Flanged Push Button Base All needed hardware Allen key GrovTec US GTSW193: Flanged Push Button Base Non Rotating M-LOK Black