Customer notice: Small-batch CNC production — limited quantities available.


One (1) CNC-machined High-flow Transfer Port

Unlock smoother airflow, improved consistency, and more efficient power delivery — with a simple drop-in upgrade.

Take your airgun to the next level with our precision CNC-machined high-flow transfer ports. Designed and manufactured in the UK, these ports replace the factory part to provide cleaner, less turbulent airflow for more consistent velocities, improved accuracy, and greater tuning flexibility — whether you shoot pellets or slugs.



Why shooters love these ports

  • Smoother, higher-efficiency airflow

  • Improved shot-to-shot consistency

  • Potential for increased power output

  • Better accuracy across a wider range of ammunition

  • No permanent modifications — direct drop-in installation

  • CNC-machined from strong, corrosion-resistant materials


How they improve performance

These high-flow ports are engineered with a precision internal chamfer to reduce turbulence as air moves through the system. Combined with tight CNC tolerances, this allows:

  • More efficient power delivery

  • More consistent velocities

  • Tighter groupings downrange

  • A smoother, more predictable tune

Ideal for anyone wanting cleaner airflow and repeatable performance — from tuners and target shooters to hunters looking for stable power levels.



Easy installation — No skill required

  • Direct replacement for the factory transfer port

  • No cutting, drilling, or permanent modifications

  • Installs in minutes with basic tools

Simply drop it in and start tuning.



Availability & pricing

We’ve kept prices as low as possible, but with material and tooling costs continuing to rise, we will eventually need to increase prices on future batches. So it’s worth grabbing one now while they’re still at the lower price.



Compatibility


✔ BSA Dynamics

✔ BSA Scorpion SE

✔ BSA Scorpion Singleshot

✔ BSA Scorpion Multishot

✔ BSA Ultra SE

✔ BSA Ultra Singleshot

✔ BSA Ultra Multishot

✔ BSA Ultramax

✔ BSA R10 

(all calibres)

Direct drop-in installation.



Which size should you choose?

There’s no universal “best” transfer port — every airgun responds differently, and your chosen ammunition can influence airflow needs.

Most shooters select 2–3 port sizes to find the perfect balance of:

  • Airflow

  • Velocity

  • Consistency

  • Shot count


How port size affects performance

A larger transfer port allows more air to pass through, which can:

  • Increase muzzle energy

  • Improve performance with heavier pellets and slugs

  • Provide a more power-focused tune

A smaller or standard-size port generally offers:

  • Better air efficiency

  • Higher shot count

  • Smoother tuning for pellets or lower-power setups

If you’re unsure which size to choose, you can measure your factory port and select:

  • The same size for consistent behaviour

  • Slightly larger for increased airflow and power potential


Important usage notes

Airflow changes can affect muzzle velocity and muzzle energy.
For best results, always measure before and after installation using a chronograph.

Important: Ensure your setup remains within your local legal power limits.


Need something custom?

We also design and CNC-machine bespoke airgun components.
If you need a specific size, flow profile, or new idea — we can build it.