FPS CNC ERGAL Double O-Ring Ball Bearing AEG Piston Head – Advanced Type (TPAVN) Blowback Units and a clear round-count window

and a clear round-count window for quick ammo checks

a Quantum Trigger (sold separately) is recommended

Designed for use with standard AEG gearboxes

1 × T238 LiPo Battery 11

Built with CNC-machined aluminum

FPS CNC ERGAL Double O-Ring Ball Bearing AEG Piston Head – Advanced Type (TPAVN) Blowback Units and a clear round-count windowThe FPS TPAVN Piston Head is designed for advanced AEG builds requiring enhanced air seal and smooth performance. Made from lightweight yet durable ERGAL aluminum, this piston head features a double O ring system and an integrated ball bearing, ensuring reliable compression and optimal spring rotationeven under high ROF or heavy spring loads. Features: CNC machined from ERGAL 7075 aluminum for superior strength and reduced weight Double O ring design