Atlas rail for bipod how to attach sling stud?

[zr600]

Ok I have the Ayala bt15 or 17 rail for my bipods, how do I attach a sling stud do they make one that snaps into the one hole in the rail or on the rail? What's everyone running?

 

[6.5saum/300rum]

Flush Cup Stud Adapter

The Flush Cup Stud Adapter adds function to push button swivel bases. Use the supplied allen wrench to depress the plunger and slide the stud into the base. The standard stud is ready to accept all swivel types and/or mounting of a bipod or accessories that require a sling swivel stud. Fits all...

www.grayboe.com

I use one that looks like this but I don't remember where I bought it from.

 

[6.5saum/300rum]

SLS - Quick Detach-Sling Swivel

Gun Accessories | Fab Defense | United States

fab-defenseus.com

I like this style better if your sling will come apart for installation.

 

[Taylorbok]

I believe that's a QD cup in that rail jsut get a sling swivel that has the QD attachment.

EDIT: one of those^^^ like @6.5saum/300rum posted