HW100 Bullpup

APEX Regulator & Tune (Includes a full service)

The APEX Regulator & Tune package is designed to make your rifle more consistent and air efficient, not more powerful. All sub 12 (non FAC) rifles are set to around 11.5ft/lbs after any work is done, keeping you well within the legal limit.

Features of the APEX Airguns Regulator:

• UK-Made: Designed and manufactured in the UK, home to the most demanding airgun shooters.
• CNC Machined Components: Crafted from premium materials for stable regulator performance.
• More Plenum Space: Greater efficiency with less residual pressure drop on firing.
• High Resolution Pressure Setting: Ensures mechanical stability.
• Easy Reading and Setting: Clear body and adjuster markings.
• Longer Service Intervals: Larger section seals for greater reliability.
• Adjustable Pressure: Ranges from 20-170bar, maintaining pellet speed and accuracy.

As part of fitting a APEX regulator and tuning the rifle we also carry out a service with all orings changed. The action is worked on to increase the overall feel of the rifle, performance and efficiency. After the regulator is fitted and the tune carried out you can expect a shot-to-shot consistency of single figures as soon as the rifle has been worked on.

When fitting a APEX regulator and tuning the rifle we also engrave the breech block with our RAT WORKS logo as a way of showing that your rifle has been regulated and tuned by us, this is free of charge as part of the work. 

From January 2023 your power & consistency report is sent to you via email. This is done through our SKAN chronograph, the rifle is held in a mount to guarantee accurate results. The consistency will improve further as the rifle is used.

Below is a list of all the work undertaken as part of the tune.

Hammer Mechanism

• Ensure the assembly is free of any oil, grease or debris which can cause consistency issues
• Hammer modified for efficiency
• The original Anti-Tamper is removed to allow correct power setting of the hammer after conversion
• Hammer spring ground and polished to help increase consistency and power stability

Loading assembly

• The assembly is checked for straightness and any damage that could cause accuracy issues

Exhaust valve, transfer port & barrel

• The exhaust valve stem assembly is modified to run more efficiently
• Crown of the barrel re-cut the to increase the rifles accuracy
• Transfer port and barrel are secured correctly within the assembly

Trigger assembly

• Trigger let-off is set to a comfortable and safe amount. Any rifle that fails a drop test onto the work bench will have the trigger second stage increased to make sure it does not fire when dropped onto a bench.
• Sears are inspected for damage and replaced if required, the sears are generally of an excellent quality finish so there is rarely any need to modify them beyond the factory finish.

Please note the following for the HW100 Models specifically:

We are unable to work on any HW100s with A&M Cylinders, bottle conversions or aftermarket regulators as we are unable give the the HW100 our warranty with these aftermarket parts fitted. Please contact us prior to booking your rifle in to discuss possible options in these scenarios.

After a Tench Regulator has been fitted to your rifle you will NOT be unable to unscrew your cylinder when pressurised as the standard valve is removed and replaced with the Tench Regulator unit. Removing the cylinder with a Tench regulator in should be done with caution as it will invalidate your warranty unless authorised. 

Full Service 

The full-service strips and rebuilds your rifle replacing all seals and optionally renewing any worn parts to revamp performance (we will contact you prior to supplying and fitting any necessary replacement components), while sorting any problems you may have such as leaks, low power, poor shot count or other faults.

Service and Upgrade - Previously RAT Works tuned air rifles only

Our service and upgrade package is for air rifles that have previously had the Tench/APEX Regulator and Tune package. With a service and upgrade we will replace all the orings in the air rifle as well as applying our latest tuning formula and upgraded parts. We will often recommend this if the air rifle in questions hasn't been to us in 12 months or more as we are constantly improving our work.

RAT Works Lightweight Cylinder Body 

Please note, this only replaces the 'middle part' of your cylinder, you will keep your original HW Gauge and QF unit. This lightweight cylinder body is 50% lighter than the original Weihrauch one to improve balance and reduce overall weight. The Lightweight cylinder body does not offer any other performance benefits. 

RAT Works Replacement Quick Fill Ends

These quick fill ends are a direct replacement for the standard end, fitted with a RAT Works pressure gauge and the QF Valve design designed to stop dust and dirt from entering your air cylinder to eliminate the chance of contamination and leaks. They use the standard HW100 fill probe to fill.

These ends can also be fitted to MK1 HW100 to be able to fill the air rifle without having to take the cylinder on and off.

Stock Engraving

We can engrave either our logo or a logo/design of your choice, this can only be done on wooden/laminate stocks, the Plastic or Soft touch stocks cannot be engraved. 

Please click here for all engraving options.

Cerakote

Cerakote is a thin film coating that will protect parts from corrosion or stop them rusting further than they may have already. Cerakote is available in a range of colours and can be applied to almost anything. 

Cerakote coating can be doing while your air rifle is being worked on.

This is ideal if you use your air rifle out does and in all weathers

For more information, please click here

All air rifles will need to be booked in through our website first before we can take it on. Once we have received your order we will email, letting you know which week your air rifle has been booked in for.

You will receive a second email, the Friday before the week you are booked in for. Courier collections and drop off appointments are Tuesday onwards each week. Mondays are used to deal with emails and orders from the weekend.

Below are the different delivery options available. Please click and read through the different options carefully. There is a lot of information here, please make sure you understand it fully before selecting your delivery option.

Information for - Dropping an air rifle off

Information for - Courier collection & return

Information for - Sending & return the air rifle yourself