Polarstar jack complete drop in and play setup for m4.Polarstar Jack w/ Version 3 FCU (and V2 Gearbox & Hair Trigger) This is an unused Polarstar Jack, I've only test fired it to make sure it works. Redline SFR w/ Brown Camo Braided Hose: Slightly used, some wear. Works flawlessly, very air efficient. Evike 48CU/3000PSI HPA Tank Bought used. Born June 2016, works just fine. Next hydro testing is in 2 years AMPED IGL wide Bore SLP hose to Polarstar Jack. Guaranteed no kink, Red/Black pattern reads "Deadpool" at end of hose will also come with 2 batteries for fcu.