The SPRE sling mount from TAG Industries is pretty much the lowest profile sling plate you can get.
Machined out of 6061 T6 aluminum and finished with type III mil-spec hard anodizing, all edges have been rounded off to prevent wear to the webbing or scrapes to the user. The slot is designed to be used with TAG’s ASP slings, which use 1″ wide webbing.
Installation was a snap – took a few minutes to replace the DD ambi sling plate I had on there. Important for a lefty is the clearance to the forward assist. The slot is positioned as low as possible to minimize interference with the forward assist. I don’t use slings of any kind anymore, but my own strap that connects to my rig.
The weapon-side connector is a simple loop of webbing that goes through the sling plate. Since the SPRE-L was designed for a single thickness of webbing, I had a tough time getting my own connector through, which was a double thickness, but most people won’t have that problem. I was able to get it through, though, and make it work. I prefer it to the ambi Daniel Defense plate that I had on there, as it’s lower profile and I don’t have the uneeded loop on the left side of the receiver sticking out when I sweep the charging handle tac-latch with the knife-edge of my hand.