In 2014, American firearms designer Jim Sullivan offered a video clip interview pertaining to his contributions towards the M16 and M4 loved ones of rifles although Doing the job for Armalite. A mentioned critic with the M4, he illustrates the deficiencies located in the rifle in its recent configuration. From https://jasperunhyn.mdkblog.com/35216436/rumored-buzz-on-kac-drop-in-rail