Solid mount - Daniel Defense Rail Mount QD Swivel Attachment Point With Heavy Duty QD Sling Swivel DD-7101-S

This is a very solid and rugged mount. The flat head screw appears to be very durable and the finish is great. The swivel is heavy duty as well. However, you are definitely paying for the Daniel Defense name at $50+. One thing that bothers me is that to get the logo right side up, the screw head is at the bottom. Not a big deal, just use a tiny bit of locktite and it's not going anywhere.