GrovTec US Buttstock Sling Tail w/Push Button Base Adapter MultiCam Black. Buttstock Sling Tail Features of GrovTec US Buttstock Sling Tail w/Push Button Base Adapter Steel Keeper that acts as Catch Lock Fits many rifle stocks with sling slots Easily allows use of push button slings on carbine stocks without integral bases Package Contents: GrovTec US Buttstock Sling Tail w/Push Button Base Adapter Optional Rubber O-Ring for click silencing Piece of mind keeping the catch lock securely in place GrovTec US GTSL358: Buttstock Sling Tail w/Push Button Base Adapter MultiCam Black