Side mounted process using an built-in MILSTD 1913 rail piece for sighting methods. Suitable for use With all the M203. This is called provider tilt. The ALP makes it possible for the working rod to wiggle to appropriate to the downward stress around the bolt and transfers the drive straight https://knights-armament-ras16706.onesmablog.com/little-known-facts-about-knights-armament-m4-quad-rail-69834964