I would avoid - Guntec Usa Guntec Ar15 Single Point Sling Qd Adapter Ambi Black

There's nothing wrong with the quality, it's the design. The lower lip extends below the edge of the upper receiver (Daniel Defense and Yankee Hill receivers were used) and stands out sitting into your hand, right over the crease between thumb and forefinger. I installed one, saw this, and immediately removed it (and another I had installed but didn't notice) since I could foresee this thing digging into my hand. I use other guntec products and will continue to do so, just not this.