F2 polarstar HPA engine convertion kit m4 airsoft v2

Velocity: 480fps w/ .20g @ 145psiThe F2 allows for easy velocity adjustment just by changing input pressure and does not require different nozzles to reach its full velocity range. Using a standard M4 as an example, velocity can be adjusted from below 280fps and up to approximately 480fps with a .20g BB. Velocity can vary per model as longer barrels will increase the maximum velocity while shorter barrels will decrease it. ROF: 30rpsThe maximum cyclic rate of the F2 is affected by several factors such as the operating pressure as well as quality of the magazine and BB #39;s used. However, 30 rounds per second is achievable in most standard configurations.Air Efficiency: 1000+ shots from 13/3000 @ 1.5J  w/ .28gThe standard F2 poppet valve is equivalent to the Red Low-Flow poppet of the Fusion Engine. However, this valve responds faster and requires less air volume to operate so the F2 is able to achieve greater air efficiency than even a finely tuned Fusion Engine