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View larger AirsoftParts replacement seal set for DURAL 2013 / TECAFORM 2013 piston heads is designed to restore proper sealing of the piston assembly. It includes a sealing O-ring and a centering ring. The manufacturer recommends replacement after approximately 10,000 BBs fired or once a year, as operation gradually deforms the O-ring and reduces its sealing performance.

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ASPARTS010
AirsoftParts DURAL 2013 piston head is a durable CNC-machined piston head made from EN AW 6012 T6 duralumin, designed for V2, V3 and V7 gearboxes with springs up to M170. It features pressure-assisted sealing through 9 front holes, a guide O-ring for centering inside the cylinder and an axial ball bearing that allows the spring to rotate more freely...
ASPARTS012
AirsoftParts TECAFORM 2013 piston head is a lightweight CNC-machined piston head made from TECAFORM (POM), weighing 8.7 g and designed for V2, V3 and V7 gearboxes with springs up to M150. It features 9 holes for pressure-assisted sealing, a guide O-ring for centering inside the cylinder, an axial ball bearing and a through-locking nut for secure mounting.
4UAD003
4UANTUM SMOOTH universal lubrication pen from 4UAD with red lubricant. Specially developed for AEG, GBB, and HPA airsoft weapons. Suitable for plastic and rubber parts without risk of material degradation. Rotating applicator for easy application and convenient portability. Keep it smooth, keep it shooting – don't let your gears run dry!
SPARMS439
Specna Arms silicone grease in a practical 50g package is an essential service lubricant for airsoft gun maintenance. It is particularly suitable for O-rings, seals, AEG pneumatic systems, GBB valves and HPA systems. It helps reduce friction, protects sealing components from drying out and extends their service life.
SPARMS444
Specna Arms silicone oil spray with a volume of 150 ml is a universal maintenance product for airsoft guns. The low-viscosity silicone oil easily reaches O-rings, seals, valves and moving parts, reduces friction and helps protect rubber and plastic components against drying out and ageing.
AirsoftParts replacement seal set is a service kit for DURAL 2013 and TECAFORM 2013 piston heads, designed to restore proper sealing of the piston inside the cylinder. During repeated piston movement, the sealing O-ring is subjected to mechanical stress and gradually deforms, which can lead to reduced air seal performance and negatively affect the consistency of the gun's performance. Regular inspection and timely replacement of the seal are therefore part of routine maintenance of this piston assembly. The manufacturer recommends replacement approximately every 10,000 BBs fired or once a year. The set includes not only the sealing O-ring itself but also the corresponding centering ring.
A new O-ring helps restore proper sealing between the piston head and cylinder when the original seal has become worn or deformed.
The set is designed for AirsoftParts DURAL 2013 and TECAFORM 2013 piston heads, so there is no need to replace the entire piston head during routine servicing.
The manufacturer recommends replacing the seal approximately after every 10,000 BBs fired or once a year, whichever comes first.
The service set includes both a sealing O-ring and a centering ring, providing both components specified by the manufacturer for this replacement.
Timely replacement of a worn seal helps maintain proper air seal performance and consistent sealing of the piston inside the cylinder.
As the piston moves, the O-ring is repeatedly subjected to mechanical stress and can gradually deform and lose its ability to seal properly. A worn seal can subsequently reduce the air seal performance.
The manufacturer recommends replacement approximately every 10,000 BBs fired or once a year. It is also advisable to inspect the condition of the seal during routine gearbox servicing.
This set is designed for AirsoftParts DURAL 2013 and TECAFORM 2013 piston heads. Compatibility with other types of piston heads is not specified in the supplied information.
The package contains 1 sealing O-ring and 1 centering ring for servicing a compatible piston head.
| Variants | DURAL / TECAFORM 2013 |
| Color | Black |