Trust me, it's worth saving up your money for an ARMS #18. I've tried all the cheapies and endured lots and lots of grief.
The cheaper alternatives are great for screwing around at the 100 yard mound. For a while anyways. If you are more serious about tweaking all the accuracy out of your M14, then don't pound your head against the wall, just buy the ARMS # 18... quit smoking or drink a lot less... that's how you get your ARMS # 18 !! Trust me, it's worth the effort !!
Binder Dundat,
Barney