I will trade these guns for a polar star. Trade offers mostly wanting a polar star. Iam selling / trading a mk18, western arms gbb , s thunder nade launcher, 2 shells , and a kx3 amplifier.It has a shs steel pistion, kwa 13:1 gear set, wired to deans, installed a sorbo pad, shoots around 350-400, modify tappet plate, echo 1 shell, echo 1 spring guide, a&k motor. For externals I installed a daniel defense 8 in rail onto a magpul body ,ctr stock, lancer tactical peq, magpul mbus , and a noveske kx3