This has an A&K lower and an older lancer tactical upper. The upper and lower are both full metal and the stock is polymer. The forward grip (included) is also polymer. There is a slight gap between the upper and lower receiver which you can see in the 3rd and 4th pictures. There are also some major scratches one a part of the rail. The gun is also missing one of its pins, but it still works fine. The charging handle is also missing it’s spring, but still will open the dust cover for hop up adjustments. all of this is purely cosmetic and does not effect the performance of the gun. Parts list - lonex 18:1 gears - Lonex piston/piston head - ace tech basic mosfet - r hop patch - the rest of the parts are stock The gun will sometimes over hop bb’s to the moon. I’m thinking is has something to do with the r hop patch. Removing the patch may solve you problems, it tried this but the gun could not handle .3’s after the modification. To be clear, the r hop patch is still installed, but you may want to replace the bucking and patch for a more consistent grouping. I’m asking $140 with free shipping. Please message me through hop up with questions or offers. I will not sell for less than $140. I can include evike BAMF gen 2 magazines for 6 dollars a mag if you would like.