Polymer lower, polymer drop-in kit, decent upper, tactical rails, Magpul flip-up rear sight, standard M16 front sight (not a huge fan of this piece), adjustable carbine stock, Magpul polymer mags (30 rounds each), and a holographic sight. It's pretty kick a**. Needs a good cleaning. Just some TLC. I'm going to get a sling, forward grip, new pistol grip, new butt plate, and a digital camo kit for it. Probably throw a flashlight and laser sight combo on it.