Hello, I am auctioning my g&g ARP9 that has a polarstar fusion engine with a RED nozzle that allows you to gain more FPS without using more air. It comes with a battery, fcu, flip up sights, suppressor and two mags. You may have to change some settings of the fcu due to it being set to a different gun that I had it in before. Don’t get me wrong everything still works! This gun is GREAT for cqb and making high/mid range shots. It’s great for carrying and running due to its light weight.