Two rail. I have shot 18s with rifle fuel like how smooth and exact They may be. I am able to place more cash into general performance parts then clone proper pieces similar to a ops brake and collar that I don't have a can for. Higher Energy matches replicate https://kac-drop-in-rail17306.widblog.com/84487225/the-best-side-of-knights-armament-m4-quad-rail