M16A4 Buttstock In relation to applying iron sights the more time barrel and stuck entrance sight presents a longer sight radius which makes it much easier to shoot correctly. AR15.COM is the whole world's premier firearm community and is a collecting place for firearm enthusiasts of all types. From hunters https://m4rasrail99547.bloggadores.com/29056959/the-best-side-of-knights-armament-m4-quad-rail