I believe this was originally an elite force mp5 sd6, I bought it used and it showed up broken and beat up. I’ve done what I can to it, cosmetically it is in rough shape. It has been painted a few times and is missing some pieces here and there. Big issues: Missing charging handle Broken fire selector Creaky and a bit loose in different places Only shoots in full auto due to broken fire selector Positive side: - I put a brand new gearbox in with a quick change spring and 7mm ball bearings - New piston head and refurbished cylinder head, the air seal is perfect - The gun is actually very accurate even with the current bucking and no hop up adjustment - 2 high cap mags So if you plug a battery in and fill the mag, the gun shoots without any issues, it just could use some TLC. If you are looking for a loaner gun or a beater then this would be great, if you’re looking for something pristine or great condition then this is not the one for you. I’m just trying to get some of the money back that I invested in it, asking $100 shipped OBO through PayPal. Please only buy if you know a bit about tech’ing and understand what you are buying.