AirsoftParts replacement sealing O-ring for a duralumin nozzle is a service part designed to restore the correct seal between the nozzle and cylinder head. During operation, repeated nozzle movement gradually deforms and wears the seal, which can lead to reduced air seal performance. We recommend replacement every 10,000 shots or once a year.

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ASPARTS039
AirsoftParts duralumin nozzle is a precision CNC-machined AEG air seal component made from durable EN AW 6012 T6 duralumin. An internal O-ring seals the connection between the nozzle and cylinder head, helping to reduce unwanted air leaks. The standard version is available in various lengths and weighs only 0.8–1.3 g depending on the variant.
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!
4UAD006
4UANTUM SEAL Silicone Grease for Sealing by 4UAD in a transparent finish. High-viscosity sealing grease. Ideal for sealing repairs and preventing leaks from damaged O-rings. Suitable for electric AEGs, manual, GBB, CO2, and HPA gas guns. Content: 15 ml. Easy application with a pen applicator.
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.
This expert product description was prepared by the ANAREUS.cz expert team. All rights to this unique content are tied to the anareus.cz domain.The nozzle sealing O-ring is a small but important part of an AEG air seal system. It is located inside the nozzle and helps seal the connection as the nozzle moves along the cylinder head, preventing unnecessary air loss during firing. Constant nozzle movement mechanically stresses the O-ring and can gradually cause deformation, wear and a subsequent reduction in air seal performance. As part of regular servicing, we recommend replacement approximately every 10,000 BBs fired or once a year, whichever comes first. When replacing it, it is also advisable to check that the nozzle moves freely along the cylinder head without binding.
A new O-ring helps restore the correct seal between the nozzle and cylinder head and reduce unwanted air leakage.
The O-ring is designed as a replacement nozzle seal for regular maintenance or troubleshooting reduced air seal performance.
For preventive maintenance, we recommend replacing the seal approximately every 10,000 BBs fired, as its condition gradually deteriorates with use.
For less frequently used guns, we recommend replacing the O-ring at least once a year as part of regular air seal system maintenance.
Regular inspection of this small seal helps maintain correct operation and air seal performance without the need to replace the entire nozzle.
The O-ring creates a seal between the nozzle and cylinder head. This helps reduce compressed air leakage at the point where the nozzle moves during firing.
We recommend replacement every 10,000 BBs fired or once a year, whichever comes first. With intensive use, it is also advisable to check its condition during every major service.
The nozzle moves along the cylinder head during every cycle, so the O-ring is repeatedly subjected to mechanical stress and deformation. Gradual wear can reduce its ability to seal correctly.
ANAREUS tip: during servicing, also check the surface of the cylinder head and the free movement of the nozzle. The new seal should slide smoothly along the cylinder head without excessive resistance or binding.
| Color | Black |
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