This is my fully custom built f2 polarstar build. It shoots perfectly and is an awesome speed soft/ high speed game build. I am also selling a tank, polarstar regulator, back pack, mags and line if you are interested in a full setup. Specs: Laylax tightbore Kryact HopUp Polarstar f2 engine (recently serviced) Stubby stock G&G receiver EMG rail Pts grip Suppressor Max speed trigger Let me know if you have any questions, the price is negotiable. For 1k you get free shipping.