Get the ultimate power of a 500+ FPS airsoft gun - the fastest airsoft guns on the market! These very powerfulpower guns are usually upgraded custom airsoft guns that are tuned to the max. These guns are limited, advanced, and custom made which makes them unavailable elsewhere. A specially tuned 500+ Fps gun requires advanced upgrades and upgrade parts, fine tuning by a highly skilled airsoft technician and a lot of quality controlled testing. Some spring sniper rifles require fewer upgrade parts to achieve a speed over 500 fps, but others require a high performance airsoft upgraded piston, piston head, high power spring, and the trigger sear and trigger box. On airsoft electric guns AEGs, it requires almost every internal part to be upgraded in order to withstand the extreme power.