My AR came with 2 factory sling mounts near the FSB, one on the side and one on the bottom. I have a 2-point USGI sling attached right now running from the rear stock to the side mount. The bottom mount is unused and flops around and makes noise when I move the gun around. This is undesirable if I am in my house checking out a noise or something etc. and I wouldn't want to bring attention to myself. Is there any real use for this bottom mount? It seems like it's in a weird spot and has no practical uses? It's riveted on there but I can get it off. Is It worth removing or might I want it for something?