AEG pistons and piston heads are key components inside the gearbox of an electric airsoft gun. Together with other internal parts, they form the pressure system of the replica.

When the gearbox gears pull the piston back against the tension of the spring and release it, the piston moves forward inside the cylinder and compresses air. This compressed air propels the BB through the barrel and creates the shot.

The piston head, mounted at the front of the piston, usually includes an O-ring that seals against the cylinder walls to maintain proper air compression. A good air seal is important for maintaining muzzle velocity, shot consistency, and overall reliability.

In this category you will find AEG pistons, piston heads, and piston head O-rings for electric airsoft guns. These components are commonly used for gearbox maintenance, repairs, and performance upgrades.