Best would likely be Warnes all steel.
Base silver finish
http://warnescopemounts.com/product/m980982s/
Quick release steel rings.
http://warnescopemounts.com/product-.../quick-detach/
If you are still using the Nikon Omega 3x9x40, you will need the medium rings. I have the same style rings and bases on a Knight using the Omega 3x9x40 BDC250 scope.
http://warnescopemounts.com/product/...-medium-rings/
Last edited by Gm54-120; 08-20-2015 at 10:30 AM.