"AEP" stands for "Automatic Electric Pistol." It refers to a type of airsoft gun that is powered by an electric motor, rather than by gas or spring pressure.
AEP pistols are typically smaller and more compact than their gas-powered or spring-powered counterparts, making them easier to handle and maneuver in close quarters. They also tend to be more reliable and consistent in terms of performance, as they are not affected by temperature changes or other environmental factors that can affect gas-powered guns.
AEP pistols are powered by rechargeable batteries that are housed within the gun itself. They often have a lower muzzle velocity than gas-powered or spring-powered guns, but they make up for this with their high rate of fire and ease of use. They are commonly used in indoor airsoft games or as backup pistols by players who use larger guns as their primary weapons.