Thanks for the replies. Yes, I've checked out the dimensions of the various mounts. I have a VLTOR scout mount (the basic non-offset type) for the E-series. It is a hair to small for the LX2. The next size up (can I call it "medium") seems to be a bit big since I estimate the LX2 to be about .90". Let us know your results bullettproof. Which size did you order?