Last weekend I became the proud owner of a Remington 700. This little beauty came equipped with a McMillan A3-5 stock with a couple of the Michael's Flush Mount Cups in the side. I know these are sling attachments, but this is the first rifle I have owned with this attachment system. The general question is as follows. Is this a pretty standard spec attachment system? More specifically, will (just about) any push button sling swivel just pop right in there? Or is this a brand specific type thing where I'm confined to the specific options listed by McMillan? IE either the sling studs or Wichita swivel & loops listed on the McMillan website. I'd rather put a few PBSS's directly into the cups instead of studs then SS's, just to have less links in the chain, but I'd do that over dropping $93 on the wichita loops. Any input will be much appreciated. Thank you.