While we're talking slings & studs, let me give you my opinion on why this style:
is not your best choice for an LTR. If you're using the GI sling, the rear swivel being one piece is no big deal - the GI sling clips and unclips quite nicely. The front works fine while you're shooting. When you're done shooting, though, and need to clear the line, you will need to get your arm out of the sling, safe & clear the rifle, score targets/load mags/talk/drink/whatever and then get back into the sling, adjust it, try to find the same spot on your arm, adjust again and waste valuable prep time.
With a quick disconnect, you can remove the sling from the rifle, and then leave the sling on your arm until the next course of fire - no constant readjusting. It's not impossible to use the fixed sling swivels - but I quickly figured out that the QDs are easier, especially on Sunday of an Appleseed.