Includes intermediate airsoft guns and high end airsoft guns. Industry standardfor the serious airsoft player. Standard shooting speed and FPS is about 300-350 fps best for close quarters battle, CQB, CQC, or indoor games. Under 350 FPS guns have enough power to be best all aroundairsoft in all settings. 350-400 Fps is slightly tuned for more shooting power with minor upgrades such as springs and barrels. High rate of fire, full complete metalairsoft construction, or ABS plastic airsoft is common. These guns include M4 and AK47 style and other Top 10 airsoft guns.