The Poseidon Ice Pick GBB Flute Valve System is that the perfect solution for airsofting in cold conditions. this technique allows your gas blowback pistol or rifle to cycle properly when being fired in temperatures as low as 15 degrees. Furthermore, the gas flow efficiency can increase to up to 40%. Overall, this kit is great for enthusiasts looking to urge the simplest out of their airsoft gun in colder conditions.