King Arms Sig 556 (discontinued) with the following installed: Polarstar F1 HPA engine Customized to fit a pro-win hop up unit Prometheus barrel Mad bull red 60 degree flat hop bucking (flat hopped with Prometheus flat nub) SIG butt stock Full metal RIS rail Includes 10 metal mod caps This was my very first airsoft gun and has been with me for many years. I went on a venture to HPA it, which required some work. The weapon could use some work to get better accuracy, but still works non the less. I will include all the parts i still have that were taken out/swapped. Comes with original hand guard and Butt stock that were painted tiger stripe. also have a M203 grenade launcher with 2 grenades I used as a heavy weapons/anti vehicle weapon. Also comes with a Hard Case for the rifle, and have other gear if needed. M203 NOT included in the price. Shipping not included in price. Let me know if you have questions. $50 for shipping. Send best offer EDIT: I have taken out the old rHop I installed because I think it was faulty and the reason behind the inaccuracy issues. Installed a prometheus flat hop with mad bull red bucking and cleaned out the barrel. Fairly confident that was the issue. Haven’t tested it yet. Update: item on eBay and has 1 bid currently. https://www.ebay.com/itm/233841434217?_trksid=p2471758.m4704 TRADES: Intel I7 9700k processor with motherboard.