Side mounted method using an built-in MILSTD 1913 rail piece for sighting methods. Made for use While using the M203. After a while the Marine Corps did approve using the six-placement collapsing stock on M16s for smaller sized shooters to employ whilst wearing armor. I like to contact these the https://chanceywqic.topbloghub.com/35796875/a-secret-weapon-for-knights-armament-rail