Aspect mounted program with the built-in MILSTD 1913 rail piece for sighting programs. Designed for use Using the M203. just one facts issue, I picked up a few salty employed P&S M4 RAS's from Thoroughbred for $a hundred and fifty ea. yeah, not KAC, but ok for me. I approach https://hectorwuery.alltdesign.com/rumored-buzz-on-knights-armament-ras-49292410