Huma-Air Tuning Regulator For The Air Arms S4/5XX HP
 
Designed for placing inside the pressure tube. There are two o-rings on the regulator body who seals inside the tube wall. The regulator is vented to the atmosphere for excellent regulating behavior and no creeping up in power on the long term. The regulator has a seperate volume bus (plenum) matching the caliber and chosen pressure range.
The regbody is only 16 mm long with a very small neck. This ultra compact build makes sure there is almost no lose of air volume in the pressure tube.
A simple modification to your air rifle what will result in excellent shooting behavior and very consistent pelletspeed.
 
The benefits of the Huma-Air, Air Arms S4/5XX tuning regulator are: 
 
Higher accuracy of your rifle due to the elimination of the pelletspeed fluctuations
A constant pellet speed over the full working pressure range.
It will give you a better shotcount and a full flat shotstring immediately.
Adding a regulator to your airrifle will probably give you the biggest benefit in the tuning process.
Often the rifle will make less noise due to better balance in air usage 
 
 
When you order your Huma-Air, Air Arms S4/5XX Regulator you will receive: 
 
Your regulator preset to your own wishes.
A pressure scale in Bar on the regulator, for fine-tuning or re-adjustment.
We will include a “Huma-Air Regulated” breech sticker.
Fitting instructions as pdf download.