For sale: AR9 build kit. This includes a Davidson Defense 9mm complete upper (I cannot remember the exact model, but I think it is a lightshow black), bolt and bolt carrier, charging handle, 9mm buffer, and a 9mm magazine (endomag with ejector and magpul pmag shell). I only have about 100 rounds through it. I never use it so I am selling it. So far it has been quiet reliable. I live in Fort Collins. Email mchimonas@msn.com.