AirsoftParts NBU Duralumin Nozzle

AirsoftParts NBU duralumin nozzle is a precision CNC-machined nozzle for NBU / Bore Up air seal systems, made from EN AW 6012 T6 duralumin. An internal O-ring helps seal the connection with the cylinder head and reduce air leakage. The nozzle is designed exclusively for use with an NBU cylinder head and weighs only 0.8–1.3 g depending on the length variant.

AirsoftParts NBU Duralumin Nozzle for Bore Up Air Seal Systems

This expert product description was prepared by the .cz expert team. All rights to this unique content are tied to the .cz domain.AirsoftParts NBU duralumin nozzle is an air seal component designed specifically for NBU / Bore Up systems. It is CNC-machined from EN AW 6012 T6 aluminium alloy and features one internal sealing O-ring that seals the connection between the nozzle and cylinder head outlet during movement. The key difference compared to the standard version is the NBU dimensions – this nozzle must be combined with an NBU cylinder head and is not compatible with a standard cylinder head. Depending on the specific length, the weight ranges from 0.8 to 1.3 g. In addition to choosing the NBU version, selecting the correct nozzle length is also important, as its dimensions affect contact with the hop-up bucking, air seal and reliable BB feeding.

Key Features

Technical Specifications

• Model: NOZ-NBU-xx
• Type: nozzle for AEG air seal system
• Size: NBU / Bore Up
• Material: EN AW 6012 T6
• Manufacturing: CNC machining
• Seal: 1× O-ring
• Weight: 0.8–1.3 g depending on variant
• Compatible cylinder head: NBU
• Compatibility with standard cylinder head: no
• Country of manufacture: Czech Republic

Package Contents

• 1× NBU duralumin nozzle
• 1× sealing O-ring

Frequently Asked Questions (FAQ)

What Is the Difference Between a Standard and NBU Nozzle?

The NBU nozzle is dimensioned for NBU / Bore Up air seal systems. Its internal dimensions correspond to an NBU cylinder head, so it is not interchangeable with the standard version.

Can the NBU Nozzle Be Used With a Standard Cylinder Head?

No. The NBU nozzle must be combined with an NBU cylinder head. When assembling a Bore Up air seal system, always check that the individual components are dimensionally compatible with each other.

How Do I Choose the Correct NBU Nozzle Length?

tip: use the length of the original correctly functioning nozzle and the design of the specific gun as a reference. Choosing the NBU version alone is not enough – the correct length is important for the air seal against the hop-up bucking and reliable BB feeding.

Does the Sealing O-Ring Need Lubrication?

tip: during installation, we recommend lightly lubricating the O-ring and contact surface with a suitable seal-compatible lubricant. Use only a small amount to prevent excess lubricant from entering further into the air seal system.