Comes complete with: (1) Assembled Bolt and Carrier (1) Hammer Box and paperwork. Hammer is new unused. The BCG has rounds less than 200 rounds through it. All my shooting has been at TCGC rifle range, so I'd be surprised the round count is even that high. I have not cleaned the BCG since buying it, so yes, it's dirty. FTF cash at BigLots 185th @TV Hwy.