Hatsan Bullmaster Airgun regulator

Hatsan Bullmaster Airgun regulator
  • Hatsan Bullmaster Airgun regulator
  • Hatsan Bullmaster Airgun regulator
  • Hatsan Bullmaster Airgun regulator
  • Hatsan Bullmaster Airgun regulator

Years proven regulators (since 2010) used by thousands of satisfied customers around the world.

This regulator can be installed in most airguns which use standard airtank with thread M 18x1,5.

With regulator is also send nylon spacer ring and two USIT o-rings with different thickness, which can be used in the case when gauge and filling pin is not in a good position.

Download instructions: HERE

Regulator also removes semiautomatic jamming when the pressure is too high in the bottle.

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


The Airgun Regulator is the same as regulator for rifles gunpower, the only change is that in the package is also a nylon spacer ring, which is used in the case when gauge and filling pin is not in a good position. It is a simple installation without adjustments on rifle, so everything can be returned back. All you need to do is unscrew the bottle from airgun body (before screwing launch air). Then screw regulator between the bottle and airgun body. After installing the regulator NEVER fill by quick fill on the airgun, only by quick fill on regulator. For the filling, you must purchase paintball coupling, which is the same as gun marauder or more. Do not use pin as a lever for tightening regulator. For that is added screw-in spare o-rings.

Videos for installation and proper use regulator in the airgun Hatsan Bullmaster

Unfortunately, we did not have Hatsan with airtank in our workshop, you can Check similar installations

Installation for Daystate Wolverine B

Video Installation for Sniper X2 bottle version which has airgun under barrel

Installation for Royale 400

Video how to take regulator out of regulator body

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

Installation instructions for Airgun Hatsan Bullmaster 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 Hatsan Bullmaster

Before removing plug we need to drain all air from airtank.

Mount Altaros regulator

Screw regulator on plug. We have to be sure that the regulator has in the groove the o-ring. Then screw the regulator back into the bottle and check again the presence of o-ring in the neck of the bottle. Check the o-rings (cleanliness, if they are without damage) on filling pin and manometer. Pin and manometer screw-on regulator only with fingers, screw them so much that the upper larger cylinder of manometer and pin are touching regulator perimeter. Slot for pin and manometer can be changed depending on where you get more comfortable with his position, You can make a small correction and unscrew bottle little bit (no need to complete attachment to the wall). When your manometer and pin has bad position you can insert black nylon ring in place o-ring. This changes the position after screwing.

Filling and draining air

NEVER fill air through valve on airtube, but always fill through quick fill on regulátor. If it is all ok, connect Paintball coupler and fill airtube. Be sure that paintball coupler ball lock is fall in. First filling make slowly around 2-3 per second Bar. According to the type of bottle can be pressurized up to 250 bar (3600 PSI). After filling to set pressure drain air from hose and disconnect paintball coupler.

Setting pressure of airgun regulator

Altaros regulator output pressure can be set from 100bar (1450 PSI) to 150bar (2200 PSI) and after consultation of up to 170bar (2500PSI) which corresponds to the rotation of the screw behind value 150bar so that the line of the screw is pointing to the letter R. 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 2/3 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

In this picture you will find an old scale (set at 100 bar), which we no longer sell.

Shipment contains

  • Altaros Regulator
  • Pin and manometer
  • 2 pieces 2×1 o-rings for bolt on pin
  • 3 pieces 4×1 for pin and manometer
  • 1 piece 19×2,5 seal between the valve and the regulator body


You must keep maximum cleanness in the entire pressure system (airtube and outer o-rings). Do not disassemble the regulator without previous approval, which will be awarded based on e-mail correspondence, where you provide the reason why it would be necessary to disassemble the regulator. In the case of a breach of this procedure you may damage the regulator function (fully assembled regulator is not simple and it is necessary to follow the correct procedure). For these reasons, the disassembly without previous consent, or failure exact installation procedure can not claim the warranty. Since regulator is not original part from the manufacturer’s, installation is on your own responsibility.

Results with installed regulator in air gun Hatsan Bullmaster

Thanks for results of Georgios from Germany.

Results with Altaros regulator and JSB King pellets

Jsb King 24gr
Reg 145 bar
Rifle pressure 3350psi

Results with Altaros regulator and mold slugs

Mp mold slugs 48 gr not weighted or sorted
Reg pressure 145 bar
Rifle pressure 225 bar
Hammer Springsetup on maximum
This time i hade only this 17 pieces

Results with Altaros regulator and JSB Heavy

Hatsan Bully .25
JSB heavy 34 gr. 1 265 16 265
Regulator set on 140 bar 2 258 17 265
Gun was pressurized to 3900 psi 3 263 18 264
Hatsan Bully LW barrel 24 inch 4         error 19 263
moderate Hammer spring setup. 5 267 20 263
6         error 21 261
7         error 22 264
8 267 23 264
9 268 24 265
10 269 25 263
11 264 26 270
12 266 27         error
13 265 28         error
14 263 29         error
15 264 2050 PSI

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