AirsoftParts CLASSIC NBU Cylinder Head Spare O-ring (2 pcs) | ANAREUS View larger

AirsoftParts CLASSIC NBU Cylinder Head Spare O-ring (2 pcs)

AirsoftParts replacement seals for the CLASSIC NBU cylinder head (2 pcs) are a service set of O-rings designed to restore proper sealing of the Bore Up air seal system. Regular replacement of worn seals helps reduce unwanted air leakage. The manufacturer recommends replacement approximately every 10,000 BBs fired or once a year.

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AirsoftParts Replacement Seals for the CLASSIC NBU Cylinder Head

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.AirsoftParts replacement sealing O-rings are designed for servicing the CLASSIC NBU cylinder head. The NBU version is designed for the corresponding Bore Up air seal system, so it is important to use the correct size seal for this cylinder head when replacing it. The O-ring provides a seal between the cylinder head and the inner wall of the cylinder, and its condition directly affects the sealing of the entire assembly. During use, the rubber can gradually age, deform or wear, which may lead to unwanted air leakage and less consistent performance. The manufacturer therefore recommends replacement approximately every 10,000 BBs fired or once a year. The package contains two replacement O-rings, providing one for the current replacement and another for future servicing.

Key Features

For the CLASSIC NBU Cylinder Head

The replacement O-rings are designed for servicing the AirsoftParts CLASSIC NBU cylinder head and the corresponding Bore Up air seal system.

Restores Proper Sealing

A new O-ring helps restore the seal between the cylinder head and cylinder and reduce unwanted loss of compressed air during firing.

Recommended Service Interval

The manufacturer recommends replacing the seal approximately after every 10,000 BBs fired or once a year, whichever comes first.

Replacement Without a New Cylinder Head

If the cylinder head itself is in good condition, the replacement seal allows you to replace only the worn O-ring and keep the original component in service.

Two O-Rings Included

The package contains two replacement sealing O-rings, allowing one to be used for the current service and the other to be kept as a spare.

Technical Specifications

  • Type: Replacement cylinder head sealing O-ring
  • Compatibility: AirsoftParts CLASSIC NBU cylinder head
  • System: NBU / Bore Up
  • Function: Sealing the cylinder head inside the cylinder
  • Recommended Replacement Interval: Every 10,000 BBs fired or once a year

Package Contents

  • 2× sealing O-ring

Frequently Asked Questions (FAQ)

What Is the Difference Between CLASSIC and CLASSIC NBU Seals?

The CLASSIC NBU version is designed for the NBU / Bore Up cylinder head system. It is therefore important to use an O-ring that corresponds to the specific cylinder head version when servicing it.

How Often Should the O-Ring Be Replaced?

The manufacturer recommends replacement approximately every 10,000 BBs fired or once a year. It is also advisable to inspect the seal during regular gearbox servicing.

How Can I Tell If the Cylinder Head Seal Is Worn?

During servicing, check particularly for deformation, hardening, cracking or other mechanical damage to the O-ring. Reduced air seal performance can also be a reason to inspect it.

How Many Seals Are Included?

The package contains 2 replacement sealing O-rings for the AirsoftParts CLASSIC NBU cylinder head.

VariantsCLASSIC NBU
ColorBlack
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