AEG: Auto Electric Gun
AEP: Auto Electric Pistol
LPEG: Low Price Electric Gun
HopUp: Adjusting mechanism for accuracy. The "Hop-Up" system, which is installed in most stock airsoft rifles and pistols, is used to add extra range to the pellets by putting a backspin on each as it is fired. A small rubber nub protrudes into the top of the barrel through a small hole, and it catches the top of the BB as it flies past. Adjusting the Hop-Up makes the nub protrude lower or higher into the barrel, so that backspin is increased or reduced. Ideally, the Hop-Up should be adjusted so that the pellets fly as far as possible in a straight line. The Hop-Up adjustment is usually relatively easy to access so that players can adjust it during play. On the majority of airsoft guns, it is located underneath the in-built bolt cover, but sometimes it is only accessible by using an Allen key.
LiPo: Lithium-Ion Polymer batteries. Rechargeable batteries that are known for their larger capacity, high discharge rates and light weight. The larger capacity allows the battery to hold a lot more power and the high discharge rate powers the most demanding electric motors. These two conditions, coupled with the light weight are what have made battery powered RC products, especially helicopters, a lot more viable. In the past most RC helicopters used fuel, because the traditional batteries types used for RC (NiCad and NiMH) were not very compatible. They were heavy, didn’t last long and were not always fit to power the stronger motors of larger/heavier models.
Important: LiPo batteries are quite complex in their construction and composition, so it’s recommended to charge them with the chargers that come packaged with the RC product. You can NEVER charge LiPo batteries with NiCad or NiMH battery chargers. Doing so is extremely dangerous. Because of their chemical composition incorrect charging can cause the battery to burst in flames. While different chargers can be balanced if so desired, we don’t advice doing so, unless you have an understanding of how batteries work. You should still follow a few tips even if using the compatible charger provided. Never charge the batteries unattended, use a safe and solid surface to charge and keep them in an open and well ventilated space.
CQB: Close Quarters Battle. Also referred to as CQC (Close Quarters Combat). CQB, in general, refers to any combat that takes place in small, oftentimes enclosed space, and between small units. In the sport of airsoft it is not much different. These are airsoft competitions that are fought between two small teams, usually in venues built particularly for this reason. There are many such facilities around the country. In CQB the favorite airsoft guns are usually small size rifles, airsoft pistols and even some airsoft shotguns. This term can usually be seen in the description of certain airsoft products, indicating that the product is a good choice for close quarters combat.
FPS: Feet per second. This is the preferred method of denoting BB or pellet velocity in airsoft. It indicates the speed the BB will travel with just as it leaves the barrel of the gun. A common misconception is that the FPS mentioned in the description of the gun is an absolute measurement. When dealing with velocity it is important to know about various external forces in action, such as air resistance, direction and wind speed. Usually the FPS used in the description disregards these factors.
EPE: Elastic Potential Energy. Elastic potential energy is Potential energy stored as a result of deformation of an elastic object, such as the stretching or compressing of a spring.
Springer: another name for spring-powered airsoft guns