AEG M4 Air Seal Upgrade Set

AirsoftParts Air Seal Set for M4 AEG
It includes a POM piston head, silent cylinder head, ported cylinder and a 21.4 mm nozzle. This combination is designed for M4-type AEG rifles with inner barrels up to 400 mm and provides a practical solution when replacing a major part of the air seal system or building a new configuration. The ported cylinder adjusts the usable air volume, while the piston head, cylinder head and nozzle form interconnected parts of the compression system. Proper operation depends not only on their mutual air seal, but also on compatibility with the specific gun model, inner barrel length and hop-up chamber used. In particular, the 21.4 mm nozzle length should be compared with the original nozzle before installation, as individual M4 models may use different dimensions depending on the manufacturer and design.
Key Features

Four Air Seal Components in One Set
The set combines a piston head, cylinder head, cylinder and nozzle, so there is no need to purchase the individual components separately.

POM Piston Head
The set includes a POM piston head that operates inside the cylinder and uses its seal to generate the required air pressure as the piston moves.

Silent Cylinder Head
The silent cylinder head forms the front section of the compression chamber, and its design also helps dampen the mechanical impact of the piston assembly.

Ported Cylinder
The ported cylinder has a reduced usable working volume compared with a full cylinder, allowing the amount of compressed air to be matched to the corresponding inner barrel configuration.

21.4 mm Nozzle
The set includes a 21.4 mm nozzle. Before installation, it is advisable to verify the required length for the specific combination of gearbox and hop-up chamber used in the M4.
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