High everyone. I just got my first AR. Built by Tactical Weapons Solutions. It has a Yankee Hill free float quadrail. It also has an ambi sling plate at the back of the receiver. I currently have a single point sling that clips to the ambi plate at the rear of the receiver. I would like to go with a 2 point adjustable sling like MGPUL OR Vtac. My question is: is the hole in the front of the the YHM quadrail on each surface for a QD swivel? If so, what swivel is intended for use there? Also, what are your opinions on the different brands of quick adjustable slings. Thanks guys.