I've installed the CASM scope mount on my USN MK14 Mod 0 type SEI.
The CASM eliminates the rear sight... this particular EBR stocks cheek riser
never went low enough and this made it virtually impossible to access the
otherwise excellent iron sights... an Insight mRDS with a 3.5 MOA reticle is
mounted offset and in front of the 3.5-10x40 optic. I am currently fine tuning
the position of the optic and cheek riser for best results and plan to take it for a
spin later this week, but I will need to do it again once I've replaced the butt stock.