Facet mounted procedure having an built-in MILSTD 1913 rail piece for sighting techniques. Suitable for use While using the M203. just one details issue, I picked up a handful of salty utilized P&S M4 RAS's from Thoroughbred for $150 ea. yeah, not KAC, but good enough for me. Posted by https://marcopmerp.ltfblog.com/28867378/the-5-second-trick-for-ras-m4