Air Arms S400/S410/S510/HFT500 HuMa Regulator - Internal - DIY Fit
This is for a DIY fit HuMa internal regulator for your Air Arms S400/S410/S510, Ultimate Sporter and HFT500. It is best suited to people who have rifles with no anti-tamper or the owner knows how to adjust the power to keep the rifle legal. The regulator pressure is user adjustable, which allows you to fine tune the pressure to suit the type of tune you have opted for.
The air cylinder will need to be drilled when fitting the regulator, please do not buy this regulator if you don't want to drill your air cylinder, the regulator will not work properly if you don't drill the breather hole.
Before ordering a regulator, please make sure you have made yourself familiar with the fitting instructions on the Fitting Instructions page on the website, you are happy/able to carry out the necessary work and you are able to adjust your power to keep your rifle legal.
Also bear in mind that if the inside of your air cylinder is rough/scratched the regulator will not seal properly unless you hone/polish the inside of the air cylinder to remove the scratches.
If your rifle has a pressure gauge fitted, it will read the regulator air pressure once the regulator has been fitted, rather than the cylinder pressure.
The regulator does not come with any fitting instructions, you will need to follow the fitting instructions linked to above or follow this guide >>here<< There are also some very good guides and tutorials on YouTube about regulating Air Arms rifles which will help you get the most out of your rifle.
For more information about the regulators please have a look on the HuMa Air website.
You will need access to a chronograph to set your power after fitting the regulator.
Please do not exceed the legal power limit for your country.