I also picked the SB 5-20 US for my LM308 MWS. The tipping point for me was the compact size compared to the ZCO 4-20 (not available at the time) or the Tangent Theta 3-15. All three have top tier glass and even if the glass scores a tiny big lower compared to the others, the size won me over. I got the RAL 8000 and had everything cerrakoted to match. Really just finished the build and am waiting for the rain to clear to take it out. BTW CS Tactical was great to deal with on the scope.
Rasyad