The SHS Double Sealed Cylinder Head is a precision‑machined upgrade part designed for AK‑series airsoft AEG rifles (typically with Version 3 gearboxes). It replaces the stock cylinder head inside your gearbox to improve air compression, seal integrity, and overall performance — an affordable yet effective internal upgrade for skirmish builds and tuning projects.
 
Key Features
Double O‑Ring Seal: Dual rubber O‑rings around the head create a tighter air seal between the cylinder and head, reducing compression loss and improving consistency shot‑to‑shot.
CNC‑Machined Aluminium Construction: Lightweight, durable aluminium build ensures strong performance and long‑lasting use inside the gearbox.
Enhanced Compression: Better sealing helps maximise the pressure generated by the piston, which can contribute to more stable FPS and improved efficiency in tuned builds.
Rubber Shock Absorption: Some variants include a rubber bumper or pad that helps cushion piston impacts, reducing gearbox noise and internal wear.
Simple Replacement: Direct swap‑in for OEM AK‑style cylinder heads in compatible gearboxes — ideal for maintenance, rebuilds, or power upgrades.