For righties the Swissicon products mount is the only way to go. Very good product by all accounts. I cant recall the manufacturer currently but someone makes a very nice over the bore permanant mount that looks very nice and I believe has a built in deflector to accomidate the streight up eject. Only having non billboard marked rifles I simply could not drill a reciever. I have most of the bits to do a "scout mount"
with a Leatherwood LER scope (no modifications required). I have to try somthing to accomidate old eyes.