CYMA SR25 Long Gearbox Piston

The CYMA SR25 Long Gearbox Piston is a reinforced internal upgrade or replacement part built specifically for SR25 length gearboxes (Version 2 long). Supplied as a complete unit with piston head pre-installed, it is ready to drop into compatible builds, making it ideal for repairs or reliability upgrades. Constructed from hardened polycarbonate with a full steel tooth rack, it is built to withstand higher stress setups better than standard plastic tooth pistons. The ported piston head with included O-ring helps maintain a consistent air seal, improving compression efficiency and overall gearbox performance.