I just picked up a model 12 in 270wsm. I was going to put a weaver one piece multi slot base on it with burris xtreme tactical rings. I have a nikon monarch 6-24x50. I was wondering if I could fit low rings or if medium would be the best bet? Also I want to upgrade the stock. Would a bell and carlson varmint/tactical be good buy or what do you guys recommend? Thanks in advance for any help.