Facet mounted technique having an built-in MILSTD 1913 rail piece for sighting techniques. Designed for use With all the M203. This is recognized as provider tilt. The ALP will allow the operating rod to wiggle to suitable for your downward force over the bolt and transfers the drive straight backwards https://rasm496396.link4blogs.com/51547580/what-does-knights-armament-m4-quad-rail-mean