For Version 3 Gearboxes
Padding: Rubber Impact Absorbing Pad
Has an o-ring on the back These high quality cylinder heads have double o-rings to provide the best air seal possible. They will perform similiar to extremely popular brands at a fraction of the cost. Professional installation of this product is highly recommended. Airsoft Station offers installation of most parts by professional airsmith technicians. For inquiries regarding installation of replacement and upgrade parts as well as other airsoft services please contact the Airsoft Station Tech Department here.