I have a few and have had more. Talley bases and split rings on some, really like the Leupold QR bases and rings on one (though don't use the switch function ability), and standard Leupold R&B work fine as well.
I have 4 6 lug Mark V Talley lightweights on 1 Talley split rings and bases on one and Near Alphamounts on the others. I really like the Alphamount but there's a significant difference in price and it looks great on a Mark V action. I tried to post an image but its too big+ . here's a link to Richards web site several images there.
DNZ 2 piece rings for a 6 lug and if price is not a consideration Near Alphamount as mentioned above. The Near Alphamount is the best hunting mount ever made.
I have Burris Double Dovetail mounts on mine, but think they are made from unobtainium these days. 30mm Signature rings on mine. I’m sure the others mentioned are good, too. Happy Trails
I have Talley lwts and split steel on a couple Mark Vs. Both are fine. One is extended but I cant remember which. Call Talley and they will give you specific details. They are great to deal with.