In 2014, American firearms designer Jim Sullivan delivered a video interview concerning his contributions on the M16 and M4 spouse and children of rifles even though Doing work for Armalite. A pointed out critic in the M4, he illustrates the deficiencies found in the rifle in its existing configuration. From https://lukasvkuel.dgbloggers.com/29912831/the-5-second-trick-for-ras-m4