I have a half dozen or so with the barrel clamp sling studs. They work much better on the rifles than a forearm mounted stud. Two reasons, first is that the stud doesn't whack your knuckle when you fire the gun. Second, and most useful, is that you can sling the rifle on your back, over the shoulder, and the barrel doesn't stick up a foot above your head and hang on every limb and vine you walk under. You can also remove the stud and screw it straight into the end of the schnable forearm and use it that way. Eliminates the finger whack, doesn't do much for the hangups. I have a couple done this way too.