Del Ton 16" Lightweight upper (M4 profile) Plum Crazy polymer lower(Lifetime warranty, I verified that it is good for all owners of lower, not just original) Upgraded to heavier Wolff hammer spring (Will include original spring) MagPul flip up rear iron sight. Magpul 30rd magazine Just counted all brass shot through this gun and it has only seen 220 rounds. It is in perfect condition. Rifle weighs just under 5lbs unloaded. $650 obo. Would be open to trades plus cash, as I need some money to put into another project. Feel free to ask any questions or request pictures of any certain parts/areas. Thank you for your interest.