A precision-machined replacement transfer port for airgun tuning. Changing the internal diameter can alter how air flows through the system, so different port sizes can be tested to suit an individual airgun setup.
These high-flow transfer ports are direct replacements for the factory transfer port.
There is no universal best transfer-port diameter.
Results can vary between individual airguns depending on the existing tune, configuration, ammunition and other factors.
We recommend establishing a chronograph baseline before changing the port, then testing again afterwards to see how your individual airgun responds.
If you are unsure which size to choose, measuring your existing transfer port is a useful starting point. Some customers choose several sizes and test them to find what works best with their particular setup.
Direct replacement, no permanent modification required.
The transfer port is typically located beneath the breech block, so fitting requires partial disassembly of the airgun.
Please select your airgun model from the order form dropdown box.
If your model or particular version is not listed, please contact us before purchasing.
Additional technical information about airgun tuning is available from McDA Workshop.
As with any tuning component, we recommend checking your airgun with a chronograph before and after making changes.
This helps you understand how your individual setup responds and check that its power remains within the legal limits where you use the airgun.