Aspect mounted program by having an integrated MILSTD 1913 rail piece for sighting programs. Created for use with the M203. This is referred to as carrier tilt. The ALP lets the operating rod to wiggle to suitable with the downward strain over the bolt and transfers the drive straight backwards https://deantfntc.bloggerbags.com/34695372/ras-rail-things-to-know-before-you-buy