Stripped after 1 use - Guntec USA AR-15 Endplate For QD 1-Point Sling Adapter

The QD insert properly fits into other mounts just fine but won’t seat into this no matter what angle I try. It fit the first time but since has either stripped the inside of the mount causing it to slip or it just is warped and won’t allow proper seating to get a grip. Worst mount I’ve used. Stick with magpul, if you go cheap, there’s a reason it costs less. Waste of money