All magpul externals including discontinued UBR stock which is worth almost 300 itself. The gbb specialist who made this used mostly real steal parts but the ones I remember for sure are the trigger, the gas block which I believe is also worth around 150 but I forget what company, and pretty sure the pistol grip and hand guard are real steel magpul but i forget. BCG is the gold Salient worth 120. 6.01 tightbore in there forget what brand. Gun shoots HARD, I use .36 with it, had to put just a small amount of pistol gas in the mag to pass chrono. I made the metal hop up unit fixed because it’s stock form was not effective for some reason, but if you’re using rifle gas and .36s you will be very happy and amazed by the results. I’ll give it to you with 5 working mags and the case in the picture. Gun is used only a handful of times. Sad to let this go but I need the money. Local in SD. Any questions lmk