In 2014, American firearms designer Jim Sullivan furnished a online video interview relating to his contributions for the M16 and M4 household of rifles while working for Armalite. A pointed out critic with the M4, he illustrates the deficiencies found in the rifle in its current configuration. In the movie, https://zionksxuj.bloguetechno.com/fascination-about-m4-ras-rail-64850387