In 2014, American firearms designer Jim Sullivan furnished a video clip interview with regards to his contributions on the M16 and M4 spouse and children of rifles although working for Armalite. A pointed out critic of the M4, he illustrates the deficiencies found in the rifle in its present configuration. https://eduardopakve.total-blog.com/detailed-notes-on-knights-armament-carbine-length-quad-rail-54750188