KAC Lower swivel sockets - what fits?

[TheGerman]

Have a KAC complete SR15 lower and tried to put my Vltor pushbutton swivel in one of the swivel sockets and it easily pulled out. Seems that not all swivels are made the same; besides a KAC swivel, does anyone know which will fit properly in these?

Thanks

 

[pharm762]

Re: KAC Lower swivel sockets - what fits?

I run a Midwest swivel and holds just fine but honestly I don't put it here because it blocks my manipulation of the safety