Re-reading the stuff below convinces me that I am getting old and fussy, but what the hell... Here are my feeble thoughts on Ken Farrell bases:
..there are a couple of slot designs now, he recently switched his slot specs to emulate the other tacticals which use an army spec'd slot pattern called Picatinny spec. So you should be aware that there are two styles, the older ones on roughly 1/2" slot centers and the newer Picatinny style.
..unfortunately they are not Picatinny spec so if you want to move a scope from one rail to another they probably will not allow you to. From one Rem. short action to another you will probably be OK, but from a Rem short action to a Rem long, or a Win. M-70 or Savage, no go. Will not work from an old style to an newer style. With true Picatinny rails such as Nears and Badgers this is inherent in their design. You do NOT have to relocate a ring, which is not a big job but still a pain in the butt. I can go Badger to Badger or Badger to Near with perfect fit.
The latest bases are said to be Picatinny spec but that is only true for each end of the base that has slots. The middle area that has the product name and model has no slot pattern and varies in size, so that throws out the lengthwise specs.
..second, Farrell rings and bases are beautifully machined and finished, but they have their little quirks. The bottom of the base is hollowed out and the manufacturer suggests bedding them to the top contour of your receiver. This is sort of a pain in the butt since you don't do that to the other heavy rails. They are also a bit higher than most other bases, this is probably not a concern but can elevate your scope quite noticeably above the barrel. His rings don't employ 1/2 inch nuts like the other guys, which means you need a big allen wrench to torque them. Some people prefer the allens, some prefer the 1/2" nuts, I guess I am used to the bigger nuts.
..if you have spent two thousand bucks on a rifle, another thousand or so on a scope, what in hell is another fifty or sixty bucks to have a true mil-spec mounting system (even tho you don't need it since you probably won't be jumping out of too many helicopters but ...).
Ken Farrell's bases are very strong and beautifully machined - and priced reasonably (53 bucks vs 125 is quite a difference). They are great for someone who wants a tapered one-piece base for a particular rifle and scope - and will leave them together.
