After having mine for a lil over a year now and had several uppers on it, and a couple of thousands rds downrange not bad for a composite lower. Likes: Trigger is nice and crisp. Fits great on alot of uppers.:thumbup: Dislikes: Takedown pins are composite and so are the detents, they become weak after time and will cause upper to shift. Also a couple of times when pulling the detents to seperate the upper for cleaning the takedown pins would come out and detent and spring flying replaced pins and detent with steel fixed this. Have one? What are your thoughts and experiences?