In 2014, American firearms designer Jim Sullivan furnished a video interview relating to his contributions to your M16 and M4 family members of rifles while Doing the job for Armalite. A noted critic of your M4, he illustrates the deficiencies found in the rifle in its current configuration. From the https://kacrail41840.thekatyblog.com/28767108/a-secret-weapon-for-knights-armament-rail