GrovTec US Picatinny Swivel Mount Black. The two-piece design of these GrovTec US Shotgun Sling Swivels provide a picatinny rail to place your sling or other accessories on and features a push button base to attach a sling swivel. The standard locking swivel stud of the GrovTec US Shotgun MTMx3 Extended Magazine Tube Mount ensures your sling or other gear stays securely attached to your firearm no matter what. This mount works for both shotguns and rifles and the steel magazine mount provides extra security to extend your magazine tube. Use the GrovTec US 8 Gauge Shotgun MTMx3 Extended Magazine Tube Mount to expand your carrying capacity and prepare for larger-scale operations. Specifications for GrovTec US Picatinny Swivel Mount: Manufacturer: GrovTec US Color: Black Fabric/Material: Aluminum Gun Type: Rifle Gun Model: Universal Condition: New Features of GrovTec US Picatinny Swivel Mount Mounts to Picatinny Rails. Quality aluminum construction is light and strong. Moveable mounting allows for precise placement. This picatinny rail mount creates a fast point of attachment for snap hooks. Fits HK style snap hooks and mash hooks. Package Contents: GrovTec US Picatinny Swivel Mount GrovTec US GTSW254: Picatinny Swivel Mount Black