Air Arms Xtra FAC airgun regulator

Air Arms Xtra FAC airgun regulator
  • Air Arms Xtra FAC airgun regulator
  • Airarms FAC
  • Air Arms Xtra FAC airgun regulator
  • Air Arms Xtra FAC airgun regulator
  • Airarms FAC
  • Airarms FAC

The easiest and fastest installation regulator in the world.

This Airgun Regulator does not need drilling in the tank. No degrade air gauge( gauge shows pressure in air tank, not regulated pressure). Simple installation.

  • 250 char. max
Caliber: .177 /4.5mm
Required energy with regulator: 7,5J / 5,5 ft/lbs


Airgun regulator for AA FAC version

With regulator are also send air chambers which allow you to install regulator like airarms classic where you will see on airgun manometer regulated pressure. Installation for these airchambers can be found in airarms classic / video section.

If you want to see on manometer pressure in airtube use AA fac installation.

If you want to see on manometer regulated pressure use AA classic installation.

We recommend use AA classic installation because this installation is much easier, there is much smaller chance to damage o-ring during installation.

Videos for installation and proper use regulator in the airgun AirArms FAC

AirArm Fac video Installation

Setting output pressure on regulator

What to do when your output pressure increasing over time? This is most likely caused by dirt on o-ring on plastic screw.

In this video is shown how remove dirt and replace o-ring. In video is used Gunpower regulator. Procedure is the same for other regulators.

Video how to take regulator out of regulator body

Installation instructions for AirArms FAC air rifle pressure regulator

It is appropriate before reading the instructions look at the video instructions and then read the instructions for avoiding common mistakes during installation AirAmrs FAC

How to mount Altaros regulator

Drain all air from airtube and unscrew coupler between airtube and barrel. Unscrew airtube and unscrew manometer to, deflect manometer and unsrew bolt under him. Unscrew the brass chamber and replace it with the regulator brass end part. Spray it with silicone then screw the end part slowly with a circular motion and pushing away from the hole below manometer to avoid damage on the o-ring. When is the end part plugged in is time to screw bolt under manometer and put manometer in original position and screw it in. Guidance, extended manuals and video tutorials in English can be found on

Setting pressure of airgun regulator

Altaros regulator output pressure can be set from 100bar (1450 PSI) to 150bar (2200 PSI). For a quick setting is on regulator engraved scale according to which the desired output pressure can be set. The total scale range of 100-150bar corresponds to approximately 1/2- turn. Unscrewing, or screwing setting screw more than 1 turn may result in a malfunction of the regulation and scale will not show you regulated pressure. Groove on red marked half of setting plastic screw represents pointer which shows you currently set pressure on the scale. To change the pressure on regulator, just simply rotate the set screw with the flat screwdriver in the appropriate direction according to regulator scale.
Regulator pressure scale with three different settings

Shipment contains

  • Altaros Regulator
  • Brass handle for regulator
  • Two Airarms classic air chambers

Recommended settings rifle after installing the regulator. Set aside screw that restricts the flow through channel in the barrel to achieve minimum consumption at 16J. Remove the side screw, which is interfering in the channel and then try screw it little by little back until it begins to decrease Shooting speed.


Never unscrew regulator brass screw plugs! If you do so the regulator immediately stops working and repair is only possible at the manufacturer! Regulator must be installed no later than six months after purchase. Ideally immediately upon delivery.
After regulator installation keep regulator in airtube under pressure at least on 20 bars.

You must keep maximum cleanness in the entire pressure system (airtube and outer o-rings).

The disassembly of the internal parts regulator or failure at the exact installation procedure means that you can not claim the warranty. Since the regulator is not original part from the manufacturer’s, installation is on your own responsibility.

Results with installed regulator in air gun AirArms FAC

With Regulator

Without the last shot (this shot was under pressure from the regulator output), Regulator set on 140 bar with jsb jumbo exact .22 – 1.03g ,15.89gr

Average 264,8ms
Min 263,4ms
Max 266,1ms
Difference 2,7ms
Shots 42
Power 36J

Without regulator


Big thanks for results from Rodrigo

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