The Complete Huben K1 & GK1 Guide
Setup, Regulator Pressure, Power Settings, Pellets, Slugs, Compressors, Filling, Tips, Tricks & Troubleshooting
The Huben K1 and Huben GK1 are unlike almost any conventional PCP air rifle or pistol.
Their patented hammerless semi-automatic operating system, high-capacity integrated rotary magazine, adjustable regulator and adjustable power system make them exceptionally powerful, fast and tunable PCP airguns.
However, the same design also means that correct setup is extremely important.
Regulator pressure, power-wheel position, ammunition weight, projectile diameter and remaining cylinder pressure all work together.
Incorrect settings can lead to excessive air consumption, poor accuracy, feeding problems, failure to reset correctly and, in extreme cases, a complete loss of cylinder air.
This guide combines manufacturer information, worldwide Huben-owner experience and practical information gathered by Pellet Guns Online from working with Huben K1 and GK1 airguns.
Huben K1 and GK1 – Hammerless semi-automatic PCP performance from Huben.
Quick Links
- Huben K1 5.5mm – Black Synthetic
- Huben K1 5.5mm – Wood Stock
- Huben GK1 5.5mm Air Pistol
- View All Huben Products & Accessories
- PCP Compressors & Cylinders
1. What Makes the Huben Different?
Most PCP airguns use a hammer that strikes a valve to release compressed air.
The Huben system works differently.
The K1 and GK1 use a hammerless pressure-operated mechanism. When the trigger releases the mechanism, regulated air pressure is used as part of the valve-opening and resetting cycle.
This provides several advantages:
- Fewer moving parts
- Very little firing vibration
- Extremely fast semi-automatic operation
- Excellent power potential
- Adjustable power
- Good efficiency when correctly tuned
- High-capacity integrated rotary magazine
The disadvantage is that the Huben is less forgiving of incorrect settings than many conventional PCP rifles.
The golden rule:
Regulator pressure and power adjustment must work together.
2. Huben K1 Overview
The Huben K1 is a high-powered semi-automatic PCP bullpup built around Huben’s hammerless operating system.
Two main stock options are available from Pellet Guns Online:
Synthetic Stock
Huben K1 5.5mm – Black Synthetic
Wood Stock
Main K1 Features
- Hammerless PCP operating system
- Semi-automatic action
- Integrated rotary magazine
- 19-shot magazine in .22 / 5.5mm
- Maximum fill pressure: 350 bar / 5,000 psi
- Adjustable regulator
- Adjustable power
- Up to approximately 100 J depending on configuration and ammunition
- Integrated moderator/shroud
- Picatinny optics rail
- Two-stage trigger
- High-pressure air cylinder
- Compact bullpup configuration
The current synthetic K1 is listed with an approximately 292 ml titanium-alloy air tube, 560 mm barrel and overall weight of approximately 3.4 kg.
Caption:
Huben K1 5.5mm – 19-shot semi-automatic hammerless PCP air rifle.
3. Huben GK1 Overview
The GK1 takes the Huben operating system and packages it into an extremely compact PCP pistol.
View the Huben GK1 5.5mm at Pellet Guns Online
GK1 Specifications
- Hammerless PCP
- Semi-automatic
- Maximum fill pressure: 350 bar / 35 MPa
- Approximately 85 cc cylinder
- 210 mm rifled barrel
- .22 / 5.5mm or .25 / 6.35mm versions
- .22 magazine capacity: 19 shots
- .25 magazine capacity: 17 shots
- Adjustable power
- Approximately 6–45 J factory-listed adjustment range
- 11 mm dovetail optics rail
- Walnut grip
- Approximately 1.2 kg
Because the GK1 has a considerably smaller cylinder than the K1, efficient tuning makes a particularly large difference to shot count.
Pellet Guns Online also carries the GK1 Mini/Shorty and other genuine Huben accessories.
Huben GK1 – the Huben hammerless system in an extremely compact semi-automatic PCP pistol.
4. Understanding Regulator Pressure
The regulator controls the pressure available to the firing system.
Increasing regulator pressure provides more pressure behind the valve, but more pressure does not automatically mean a better tune.
Higher regulator pressure normally results in:
- Greater potential power
- Greater air consumption
- Increased demand on the valve system
- Fewer shots per fill if not tuned efficiently
Lower pressure can provide:
- Better efficiency
- Higher shot count
- Excellent pellet performance
- Reduced air usage
The objective is therefore not to find the highest possible regulator pressure.
The objective is to find the lowest regulator pressure that reliably produces the required velocity and accuracy with the chosen ammunition.
5. Recommended K1 Regulator Pressures
A very useful general working range for the Huben K1 is:
150–180 BAR
For many owners this provides an excellent balance between power, reliability and efficiency.
Practical Starting Guide
| Application | Suggested Starting Regulator Pressure |
| Light pellets | 150–160 bar |
| General pellet shooting | 150–170 bar |
| Medium/heavy pellets | 160–180 bar |
| Medium slugs | 160–180 bar |
| Heavy slugs/high power | 180–200 bar where required |
These are starting guidelines, not compulsory settings.
Different generations of K1 barrels and individual rifles may prefer different settings.
Always use a chronograph when making meaningful tuning changes.
6. VERY IMPORTANT – The 31-Click Power-Wheel Rule
One of the most useful K1 tuning rules is:
DO NOT OPEN THE POWER WHEEL MORE THAN APPROXIMATELY 31 CLICKS FROM LOW.
Continuing to open the power wheel beyond approximately 30–31 clicks normally results in rapidly increasing air consumption without a proportional increase in useful velocity.
In other words:
You start wasting air.
If you require substantially more velocity while already approaching 31 clicks, the answer is generally not to continue opening the power wheel.
Instead:
- Check your ammunition weight.
- Check your current regulator pressure.
- Consider increasing regulator pressure appropriately.
- Return to a sensible power-wheel position.
- Retune using a chronograph.
- Find the point where velocity stabilises without excessive air consumption.
Example
If a heavy slug requires significantly more power and you are already at 30–31 clicks:
Do not keep opening the power wheel.
A higher regulator pressure combined with a more efficient valve setting will normally be preferable.
7. Why Maximum Power Is Not Always Best
Huben rifles can produce impressive velocities.
That doesn’t mean the highest possible velocity will produce the best accuracy.
Every projectile has a velocity range where it performs best.
Driving ammunition too fast can result in:
- Larger groups
- More flyers
- Increased noise
- Poorer air efficiency
- Reduced shot count
- Increased regulator demand
- Greater ammunition sensitivity
The best Huben tune normally represents a balance between:
Accuracy + Consistency + Power + Efficiency
A chronograph is therefore one of the most useful accessories a Huben owner can buy.
8. VERY IMPORTANT – Do Not Shoot Below Suitable Operating Pressure
This is one of the most important Huben safety and reliability rules.
DO NOT SHOOT THE HUBEN BELOW REGULATED PRESSURE.
As cylinder pressure approaches regulator pressure, there is no longer sufficient pressure differential for the system to operate exactly as intended.
Pellet Guns Online Recommended Safety Margin
As a good safety measure:
Keep cylinder pressure at least approximately 50 bar above your selected regulator pressure.
For example:
If your regulator is set to:
170 bar
consider approximately:
220 bar
a sensible refill point.
If regulator pressure begins falling as cylinder pressure drops:
STOP SHOOTING AND REFILL.
Do not continue trying to squeeze extra shots from the rifle.
9. What Can Happen If You Shoot Below Regulated Pressure?
Possible symptoms include:
- Significant velocity reduction
- Failure to cycle correctly
- Failure to reset
- Abnormal trigger operation
- Valve remaining partially open
- Air leaking
- Large pressure loss
- In extreme cases, complete dumping of cylinder air
Because the Huben is pressure operated, maintaining sufficient cylinder pressure above regulator pressure is more important than on many conventional PCP rifles.
Simple rule:
When the regulator starts falling, shooting stops.
10. Pellet or Slug?
One of the Huben’s greatest advantages is its ability to shoot both.
However, do not assume that slugs are automatically better.
High-quality pellets can be exceptionally accurate and extremely efficient from a Huben.
Pellets generally offer:
- Excellent accuracy
- Lower regulator requirements
- Better air efficiency
- More shots per fill
- Easier tuning
- Excellent performance at normal airgun ranges
Slugs generally offer:
- Higher ballistic coefficient
- Better retained velocity
- Better wind resistance
- Greater retained energy
- Better extended-range performance
For long-range shooting, a correctly matched slug can be exceptional.
For general shooting, a good pellet may actually provide the better overall package.
11. Pellets That Work Exceptionally Well
Pellet Guns Online has found several pellets that perform extremely well in .22 Huben rifles.
JTS Dead Center Precision 22.07 Grain
A particularly good option for the Huben K1 is the:
JTS Dead Center Precision .22 – 22.07 gr
These are 5.52 mm domed pellets and provide an excellent balance between weight, accuracy and efficiency.
Buy JTS Dead Center Precision 22.07 gr Pellets
They are an excellent starting point for an owner who wants more weight than a traditional 18 gr pellet without moving straight to slugs.
JTS Dead Center Precision 25.39 Grain
The heavier JTS Dead Center Precision 25.39 Grain has also produced excellent results in Huben rifles
JAC113 JTS DEAD CENTER PRECISION .22 CAL 25.39 GRAIN DOMED PELLETS / 220
These are particularly useful for higher-powered K1 setups where the owner still wants the forgiving characteristics of a conventional domed pellet.
JTS Dead Center Precision 22.07 gr and 25.39 gr – two excellent pellet options for the Huben K1.
12. JSB KnockOut MKII – An Excellent Huben Slug
One projectile that has produced particularly good results is:
The KnockOut MKII combines a relatively manageable 25.39 gr weight with the superior aerodynamic properties of a slug.
It therefore provides:
- Excellent velocity potential
- Good long-range performance
- Higher ballistic coefficient than conventional pellets
- Better retained velocity
- Good wind performance
- Excellent shot count – about 4 magazines 76 shots at 970 FPS
It is an excellent projectile to test when moving from pellet shooting into longer-range slug shooting.
As with all ammunition: Test it in your individual barrel.
13. Other Ammunition Reported to Work Well
Huben owners internationally have also reported good results with various:
-
5.52mm .22 Cal 18.13 Grain Airgun Pellets 500 pc
- JSB Exact Jumbo Heavy
- JSB Monster
- JSB Beast
- H&N pellets
- H&N slugs
- NSA slugs
- ZAN slugs
- Varmint Knocker slugs
- Huben slugs
- Custom-sized slugs
There is, however, an important lesson from worldwide Huben-owner experience:
Different K1 generations can prefer different ammunition.
An older K1 may shoot one slug extremely well while a newer barrel may prefer a completely different diameter or design.
Never assume that another owner’s perfect setup will automatically be perfect in your rifle.
14. Slug Diameter Is Extremely Important
Do not select ammunition simply because the tin says:
.22 calibre
Slug diameter can vary considerably.
Common .22 slug diameters include:
- .216”
- .217”
- .218”
- .219”
- .220”
- .221”
- .222”
- .223”
The correct diameter depends on the specific barrel and projectile design.
A projectile should engage the barrel correctly without requiring excessive force.
15. Why Loose Slugs Can Cause Huben Magazine Problems
The integrated Huben rotary magazine introduces another consideration.
If ammunition fits too loosely in the magazine, it can move forward.
When the magazine tries to rotate, a protruding pellet or slug can contact the breech/barrel area.
This can cause:
- Magazine jams
- Failure to index
- Damaged projectiles
- Double-loading problems
- Possible magazine indexing damage
Important tip
If ammunition is loose:
Keep the gun approximately level during loading and handling.
More importantly, consider a projectile with a more appropriate fit.
16. Seat the Ammunition Correctly
Correct seating is one of the simplest Huben tricks and one of the most important.
Do not merely drop pellets loosely into the magazine.
Ensure each projectile is positioned consistently.
A simple pellet seating tool can help.
Consistent seating can improve:
- Feeding
- Magazine indexing
- Velocity consistency
- Accuracy
- Reliability
17. Magazine Lock Warning
Always ensure the magazine locking mechanism is correctly engaged before firing.
Do not attempt to fire the rifle with the magazine catch incorrectly positioned or partially unlocked.
Doing so can place unnecessary stress on the magazine indexing mechanism.
If the magazine does not rotate normally:
STOP.
Do not repeatedly pull the trigger hoping it will free itself.
First check:
- Magazine lock position
- Projectile position
- Protruding ammunition
- Debris
- Magazine movement
- Indexing mechanism
Forcing the rifle through a magazine fault can turn a simple ammunition jam into mechanical damage.
18. Never Force an Oversized Slug
If a slug requires excessive force to enter or chamber:
STOP.
An overly tight projectile can increase:
- Barrel friction
- Required regulator pressure
- Air consumption
- Pressure demand
- Velocity variation
- Risk of a stuck projectile
A good slug fit should provide consistent barrel engagement without excessive resistance.
19. The Best Way to Test Huben Ammunition
Do not change five settings simultaneously.
Change one variable at a time.
A good test procedure is:
- Choose a regulator pressure.
- Choose one power-wheel setting.
- Select one projectile.
- Record starting cylinder pressure.
- Shoot through a chronograph.
- Record average velocity.
- Shoot an accuracy group.
- Record group size.
- Change only the ammunition.
Once you have identified promising ammunition, fine-tune regulator pressure and power.
20. Keep a Tuning Record
A simple table saves enormous amounts of time.
| Ammunition | Weight | Diameter | Reg Pressure | Power Clicks | Velocity | Group Size | Notes |
| JTS Dead Center | 22.07 gr | 5.52 mm | |||||
| JTS Dead Center | 25.39 gr | ||||||
| JSB KnockOut MKII | 25.39 gr | .216/.217 |
Over time this becomes a personalised tuning manual for your rifle.
21. Filling the Huben K1 & GK1
Both the K1 and GK1 have a maximum cylinder pressure of:
350 BAR / APPROXIMATELY 5,000 PSI
This is higher than the working pressure of many PCP airguns.
It means filling equipment requires careful selection.
22. Does a Huben Have to Be Filled to 350 Bar?
NO.
350 bar is the maximum allowable fill pressure, not the pressure you must reach before shooting.
The rifle can be filled to:
- 250 bar
- 280 bar
- 300 bar
- 320 bar
- 350 bar
provided you maintain sufficient pressure above the regulator setting.
The difference is primarily the amount of stored air available.
A 300-bar fill will simply give fewer shots than a 350-bar fill.
23. Best Manual Filling Option – Huben HB35 Hand Pump
The genuine:
Huben HB35 Hand Pump
is designed specifically for high-pressure Huben filling.
Buy the Huben HB35 350-Bar Hand Pump
It is capable of reaching the Huben’s 350-bar fill pressure.
Advantages
- No electricity
- Portable
- Simple
- Excellent backup
- Capable of 350 bar
- Particularly practical for the GK1
Disadvantages
- Manual effort
- Filling becomes progressively harder as pressure rises
- Filling a K1 from low pressure requires considerably more work than filling a GK1
For a GK1 owner, the HB35 is a very practical option.
For someone who shoots a K1 regularly, an electric compressor will normally be more convenient.
Huben HB35 – a genuine 350-bar hand-pump option for the K1 and GK1.
24. Best Electric Option – 400-Bar Compressor
If you regularly shoot a K1, a genuine 400-bar-rated compressor is an excellent solution.
A compressor with a 400-bar design rating provides sufficient pressure capability to fill the Huben to 350 bar without deliberately exceeding the compressor’s intended pressure range.
25. 400-Bar 36 L/min Water-Cooled Compressor
For frequent Huben filling:
220V 400-Bar Water-Cooled 36 L/min Auto-Stop Compressor
Features
- 220 V
- Up to 400-bar capability
- Water cooled
- 36 L/min rated output
- Automatic stop
- Suitable for full 350-bar Huben filling when operated correctly
This is an excellent choice for regular K1 use.
26. 400-Bar Fan & Water-Cooled 36 L/min Compressor
Another strong option is:
220V 400-Bar Fan & Water-Cooled 36 L/min Auto-Stop Compressor
This design combines:
- Fan cooling
- Water cooling
- High-pressure capability
- Automatic shut-off
- 36 L/min rated output
It is particularly suitable for owners who do a substantial amount of PCP filling.
27. 400-Bar 18 L/min Compressor
For someone who does not require the faster 36 L/min machines:
220V 400-Bar Water-Cooled 18 L/min Auto-Stop Compressor
It offers:
- 400-bar capability
- Water cooling
- Automatic stop
- Lower filling rate
- Full Huben pressure capability
This can be an excellent home-user option.
A genuine 400-bar-rated compressor is the preferred option for owners who regularly want a full 350-bar Huben fill.
28. Portable 12V / 220V Titanium Compressor
For owners wanting portability:
12V/220V Titanium Mini High-Pressure Compressor – 13 L/min
This unit is convenient because it can operate from either a suitable 12 V supply or 220 V configuration.
Important:
Its listed filling pressure is 300 bar.
Therefore:
Use it as a 300-bar compressor.
Do not attempt to force it to 350 bar.
A 300-bar Huben fill is perfectly usable and simply provides a reduced shot count compared with 350 bar.
29. Other Mini Compressors That Can Be Used
Pellet Guns Online also offers:
220V Titanium Blue Water-Cooled Mini Compressor
The Titanium Blue design is similar in principle to the very popular Yong Heng-type compressors used by PCP shooters internationally.
IMPORTANT DISCLAIMER
Some compressors of this general design may physically be capable of producing very high pressure.
That does not mean they should be operated beyond their manufacturer’s recommended pressure.
If the compressor is recommended for:
300 BAR
then:
STOP AT 300 BAR.
Do not run a 300-bar compressor at 350 bar simply because the Huben cylinder can accept 350 bar.
30. Which Compressor Should You Choose?
| Filling System | Huben Use | Full 350-bar Fill? |
| Huben HB35 Hand Pump | GK1 / backup / occasional K1 | Yes |
| 400 bar 36 L/min water cooled | Regular K1 & GK1 | Yes |
| 400 bar 36 L/min fan + water cooled | Regular/heavy use | Yes |
| 400 bar 18 L/min water cooled | General/home use | Yes |
| 12V/220V Titanium 13 L/min | Portable filling | No – 300 bar |
| Mobile 12V/220V mini compressor | Portable use | Follow rated pressure |
| Titanium Blue/Yong Heng-style | General PCP filling | Recommend max 300 bar where specified |
| 300-bar dive/SCBA cylinder | Very fast filling | No |
31. Using a 300-Bar Dive or SCBA Cylinder
A high-pressure storage cylinder is:
- Fast
- Silent
- Convenient
- Extremely easy to use
However, a 300-bar cylinder cannot give a Huben a true 350-bar fill.
The pressures equalise, meaning the rifle will normally finish slightly below the starting bottle pressure.
That does not prevent you from using it.
A 300-bar bottle is still an excellent filling solution if the resulting shot count meets your needs.
32. Hybrid Filling
Another useful option is:
Fill electrically or from a bottle to approximately 300 bar.
Then, where required:
Use the Huben HB35 for the final top-up.
This dramatically reduces the amount of hand pumping required.
33. Correct Huben Filling Procedure
Before filling:
- Make sure the airgun is safe.
- Inspect the fill probe.
- Inspect fill-probe O-rings.
- Make sure the probe and fill port are clean.
- Connect the correctly rated filling equipment.
- Start filling gradually.
- Monitor pressure.
- Never exceed 350 bar.
- Stop the compressor or close the cylinder valve.
- Bleed pressure from the fill hose.
- Only then disconnect the fill probe.
Never remove a fill probe while the hose is still pressurised.
At 300–350 bar, a pressurised hose and fitting contains substantial stored energy.
34. Moisture Control
Moisture is one of the biggest long-term enemies of PCP equipment.
Air heats during compression.
As compressed air cools, moisture can condense.
Water entering the rifle can eventually contribute to:
- Internal corrosion
- Regulator contamination
- Valve problems
- Seal problems
- Inconsistent operation
Use suitable filtration and moisture separation.
Compressor Tips
- Drain moisture traps regularly.
- Replace filters when required.
- Keep cooling systems working correctly.
- Use clean compressor intake air.
- Do not allow the compressor to overheat.
35. Water-Cooled Compressor Tips
If your compressor uses external water cooling:
- Never run it without circulating cooling water.
- Use sufficient water volume.
- Make sure water is actually flowing.
- Monitor water temperature.
- Replace hot water when necessary.
- Allow the compressor to cool between demanding fills where appropriate.
High-pressure compression generates substantial heat.
Good cooling can dramatically improve compressor life.
36. Air-Cooled Compressor Tips
Small portable air-cooled compressors are convenient but require good airflow.
Never:
- Cover cooling vents
- Operate inside a closed box
- Place against a wall that blocks airflow
- Continue filling if temperatures become excessive
Give the compressor time to cool between demanding fills.
37. Common Huben Problems
Magazine Does Not Rotate
Check:
- Magazine locking mechanism
- Protruding pellet or slug
- Ammunition seating
- Damaged ammunition
- Debris
- Indexing mechanism
Do not repeatedly fire against a jam.
Rifle Dumps Air
Possible causes include:
- Cylinder pressure too close to regulator pressure
- Incorrect regulator/power combination
- Valve failing to reset
- Internal contamination
- Sticky valve component
- Seal problem
Stop firing and investigate the reason before simply refilling and trying again.
Regulator Jumps Immediately to High Pressure
This can indicate that the regulator is not controlling pressure normally.
Possible causes include:
- Regulator seat problem
- Contamination
- Damaged sealing component
- Internal regulator fault
The rifle should be inspected rather than repeatedly fired with an unstable regulator.
Pressure Falls With Every Shot
If regulated pressure drops substantially after each shot rather than recovering normally, investigate:
- Cylinder pressure
- Regulator operation
- Regulator sealing
- Valve operation
- Air leakage
Excessive Air Consumption
Check:
- Power wheel isn’t excessively open
- Regulator isn’t unnecessarily high
- Projectile isn’t excessively heavy
- Projectile isn’t excessively tight
- Valve is closing correctly
- No leaks are present
Remember:
More than approximately 31 power-wheel clicks is normally wasted air rather than an efficient tune.
38. Barrel Cleaning
Do not automatically clean the barrel after every shooting session.
Airgun barrels frequently shoot extremely well with some lead conditioning in the bore.
Clean when:
- Accuracy suddenly deteriorates
- Changing ammunition produces persistent problems
- The barrel is visibly contaminated
- There is a known reason to clean it
Use:
- Appropriate airgun cleaning equipment
- Non-damaging pull-through systems
- Suitable cleaning products
Avoid damaging the crown.
After cleaning, expect the barrel to require several shots before returning to its normal conditioned state.
39. O-Rings and Lubrication
The Huben operates at extremely high pressure.
Seal condition is therefore important.
Inspect:
- Fill-probe O-rings
- External seals
- Accessible high-pressure seals during servicing
Only use lubricants known to be compatible with the particular seal and PCP application.
Do not introduce ordinary petroleum oils into the high-pressure air system.
40. Storage
Do not intentionally empty your Huben every time it is stored.
Leaving appropriate pressure inside the system can help keep seals seated and reduce contamination entering the air system.
Store the gun:
- Unloaded
- Securely
- In a dry environment
- Away from unauthorised users
- With suitable pressure remaining in the cylinder
41. Recommended Huben Owner’s Equipment
A serious Huben owner should ideally have:
- Chronograph
- Suitable 300–400 bar filling equipment
- Moisture filtration
- Correct Huben fill probe
- Spare fill-probe O-rings
- Accurate pressure gauges
- Pellet seating tool
- Micrometer or quality measuring equipment for slugs
- Suitable barrel-cleaning equipment
- Several ammunition options for testing
A chronograph is particularly important.
Without one, tuning becomes guesswork.
42. Good Starting Ammunition Package
For a new .22 Huben K1 owner, we recommend testing at least the following:
Pellet – Medium/Heavy
JTS Dead Center Precision 22.07 gr
Pellet – Heavy
JTS Dead Center Precision 25.39 gr
Slug
These three options allow the shooter to compare two quality domed pellets against a proven slug without immediately buying large quantities of different ammunition.
43. Recommended Filling Package
Occasional Shooter / GK1 Owner
Regular K1 Shooter
400-Bar 36 L/min Water-Cooled Compressor
or:
400-Bar 36 L/min Fan & Water-Cooled Compressor
Smaller 400-Bar Home Option
400-Bar 18 L/min Water-Cooled Compressor
Portable Option
12V/220V Titanium Mini Compressor
Remember that the portable model listed above is a 300-bar option, not a full 350-bar filling solution.
44. The Huben Do’s and Don’ts
DO
- Use clean, dry compressed air.
- Use a chronograph when tuning.
- Keep cylinder pressure safely above regulator pressure.
- Refill when regulated pressure begins to fall.
- Seat ammunition correctly.
- Test different pellets and slugs.
- Record regulator and power settings.
- Inspect fill-probe O-rings.
- Use properly rated filling equipment.
- Allow compressors to cool.
- Use suitable moisture filtration.
- Keep the magazine locking mechanism correctly positioned.
DON’T
- Do not exceed 350 bar.
- Do not use oxygen.
- Do not shoot below regulated pressure.
- Do not shoot with the magazine loading hatch in the open position.
- Do not keep firing when regulator pressure starts dropping.
- Do not open the power wheel excessively.
- Do not normally exceed approximately 31 clicks from low.
- Do not force oversized slugs.
- Do not use ammunition that repeatedly moves forward and jams the magazine.
- Do not pull the trigger repeatedly against a jammed magazine.
- Do not exceed a compressor’s recommended working pressure.
- Do not remove a fill probe before bleeding the hose.
45. The Five Golden Huben Rules
If you remember nothing else from this guide, remember these five rules:
RULE 1 – Never shoot below suitable regulated operating pressure.
Keep a healthy pressure difference between cylinder and regulator.
A good general safety guideline is approximately 50 bar above regulator pressure.
RULE 2 – Do not exceed approximately 31 power-wheel clicks.
If you need more performance, reconsider regulator pressure instead of simply wasting more air.
RULE 3 – Seat your ammunition properly.
A loose or protruding pellet or slug can interfere with the integrated magazine.
RULE 4 – Never exceed 350 bar.
350 bar is the Huben’s maximum, not its required starting pressure.
RULE 5 – Use compressed air only.
Never fill a Huben with oxygen.
46. Final Thoughts
The Huben K1 and GK1 are extraordinary PCP airguns.
They offer a combination of:
- Semi-automatic performance
- High power
- Excellent accuracy
- Adjustable regulator pressure
- Adjustable power
- Large magazine capacity
- Pellet and slug capability
- Extremely compact design
But they reward owners who take the time to understand the system.
Do not chase maximum regulator pressure.
Do not chase maximum velocity.
Do not chase maximum power-wheel settings.
Instead, tune for:
ACCURACY
CONSISTENCY
RELIABILITY
EFFICIENCY
A correctly tuned Huben shooting ammunition that suits its barrel is an exceptionally capable airgun.
Huben Products & Support in South Africa
Pellet Guns Online stocks Huben rifles, pistols, accessories and filling equipment and provides support for Huben owners in South Africa.
Shop Huben Airguns
View All Huben Products, Accessories, Silencers, Spares & GK1 Models
Filling Equipment
400-Bar 36 L/min Water-Cooled Compressor
400-Bar 36 L/min Fan & Water-Cooled Compressor
400-Bar 18 L/min Water-Cooled Compressor
12V/220V Titanium Portable Compressor
12V/220V Mobile Mini Compressor
220V Titanium Blue Water-Cooled Mini Compressor
Recommended Ammunition
JTS Dead Center Precision 22.07 gr
JTS Dead Center Precision 25.39 gr
Important Disclaimer
This guide is intended as general information for Huben owners and does not replace the official Huben owner’s manual.
Specifications and internal components can differ between manufacturing generations.
Always follow the operating instructions applicable to your particular rifle or pistol.
Never exceed the manufacturer’s maximum cylinder pressure of 350 bar.
Never exceed the manufacturer’s maximum operating pressure of any compressor, cylinder, hose or fitting used to fill the airgun.
Only use clean, dry compressed air.
Internal servicing or high-pressure repairs should be carried out by someone competent and familiar with high-pressure PCP systems.
Pellet Guns Online – South Africa
