I can't compliment you adequate about this gun. I have saved an image of it on my desktop so I am able to "clone" it someday. This is named carrier tilt. The ALP will allow the running rod to wiggle to correct to the downward force around the bolt and https://knights-armament-ras40903.imblogs.net/79313904/the-smart-trick-of-knights-armament-m4-rail-that-nobody-is-discussing