2 rail. I have shot 18s with rifle fuel like how easy and exact These are. I'm able to place more money into general performance parts then clone right elements similar to a ops brake and collar that I haven't got a can for. Two fireplace Management groups exist for https://knightsarmamentrail19528.blogthisbiz.com/35699963/the-best-side-of-knights-armament-m4-quad-rail