I ordered a 2P-TQA sling which is a great sling. They sent me the 1.25 instead of the 1.5 I ordered but they fixed it right away. I decided to keep the 1.25 and they sent me the M4 attachment for free. Great customer service. I love how they return emails withing a couple of hours.
Mounted the sling with a QD swivel on the rail. Works awesome so far. I will be using it for the next 2-gun match next month to see how well it transitions.