This is a flat top 16'' mid-length barrel with 1x9 twist,6 position m4 stock.yankee hill mid length Quad rail with rail covers ladder style, flip up front sight gas block.hogue pistol grip.this lower is anodized dark green.Quad anodized light green looks great.also has ambidextrous charging handle extended latch.great for scopes. $750. call 503-319-2810 for details.