Hand guards will change determined by which you decide to make. The URG-I As an example works by using a geissele mk16 nine″ handguard which only seem to be readily available on their freshly released URG-I upper receivers. Installation was clear-cut and straightforward, excellent layout. Only needed to use one https://knights-armament-m4-quad85184.ourcodeblog.com/26685763/everything-about-kac-ras-rail