Selling my Built DD King Arms Polarstar F1. It’s a rifle made for both CQB maneuverability and long range accuracy. This rifle has a Polarstar F1 installed which is the most air efficient engine from Polarstar. It’s basically the same as a Polarstar Jack in performance just with a better, more air efficient system. It’s a polyemr receiver with a metal rail and stuby stock which is extremely comfortable to hold. It has a finely tuned speed trigger to make shooting fast super easy. Shoots 400fps at 100psi with a .25g bb and up to 60rps. FPS range is 320-440. Comes a shown but without attachments or magazine. Tracer unit, battery charge, battery, fcu, airtank, regulator, and line can be added for extra. NO TRADES FOR HICAPAS, SNIPERS, OR GBBRS Parts list: King Arms receiver 9.5in quad rail 13.5in outer barrel Grip tape pistol grip Stuby stock Polarstar F1 Black SPEED trigger Black Amped IGL Krytac hopup Unit Madbull bucking 6.03 385mm inner barrel