GrovTec US Stud Adaptor Push Button Base Black. The answer used to be either install push button bases in your rifle or buy a new sling. Now with the GTSW235 Push Button Base to Swivel Stud Adaptor you can use a sling with push button swivels on virtually any rifle. Simply attach the adaptor to the swivel stud just like you would do with a locking swivel and now you can use your favorite push button sling without drilling into a stock or sewing on new swivels. Specifications for GrovTec US Push Button Base to Stud Adaptor: Manufacturer: GrovTec US Color: Black Fabric/Material: Steel Gun Model: Universal Size: 1 in Features of GrovTec US Push Button Base To Stud Adaptor: All Steel Construction Fully Rotational Base Package Contents: GrovTec US Push Button Base to Stud Adaptor GrovTec US GTSW235: Stud Adaptor Push Button Base Black