Rohm Parts, Repairs, Service & Tuning

 Tuning And Parts For The Rohm Twinmaster Series of Pistols and Rifles

 Magic 9 Design Ltd is the only UK stockist of repair and service parts for your Rohm, from seal kits to internal springs and levers. Our combination of original Rohm parts, In-House Re-Manufactured Parts, Direct Equivalents and Upgrade Parts allow repair and service of any Rohm model to Match Fit condition. 

 The Rohm Twinmaster series of pistols were latterly delivered running adequate power levels for most target disciplines.

This was not always the case and there are many Twinmasters in service which develop inadequate power/consistency for 10m and also many owners who would like to tune their pistols within legal limits but to a level more suited to HFT Pistol or Silhouette shooting.

In addition to the repair parts and upgrade parts shown Magic 9 Design offers you the tuning routes below to the optimum power level and shot to shot consistency for your Twinmaster:

 Rohm Twinmaster Refurbishment and Custom Work
In addition to repairs, tuning and parts for the Rohm Twinmaster series we can also offer refurbishment and custom work, opposite is a Twinmaster .20 Custom which we are building. 
The parts with the pistol include Moderator, low profile red dot sight mounting plate, air stripper and a foresight mounting ring which can be used with the air stripper or moderator. 

In addition to the custom parts the pistol includes a full set of new OEM Rohm internal components, a full seal set and our Upgrade Valve Cap ensuring long term durability and reliability. 
 Rohm Twinmaster 8 Shot Magazines
We now have stock of new genuine Rohm 8 shot magazines

£18 each + P&P
 Rohm Twinmaster PCP Regulator Spring Pack
This pack includes a set of 8 new springs for the Pre-Charged Rohm Twinmaster regulator and 4 shims for fine adjustment of pressure output. 


£20 + P&P
Rohm Twinmaster Multi-Shot Indexing Kit
This kit includes all the parts required to convert single-shot only Rohm Twinmasters to accept and function with 8-shot Rohm magazines. 
Made to customer order the indexing parts are available as a full kit for conversion or as individual components for repair/replacement 

Individual Replacement Part Prices
(1) Magazine Advance Pawl Spring   £8
(2) Double Action Sear Spring           £8
(3) Magazine Locking Hand Spring    £8
Double Action Sear Pin               £4
Double Action Sear                    £25
Magazine Advance Pawl Pin      £15
Magazine Advance Pawl           £15
Magazine Locking Hand            £15
All Prices + P&P


Full Kit £65 + P&P
 Rohm Twinmaster Standard Components Available
We have limited quantities of some other parts, please ask if what you need is not here, additionally we can make to order any unavailable and custom parts. 
 Hammer Bar
 £20.00 + P&P
 Hammer Spring
 £15.00 + P&P
 Body Gas Gallery Plug 
 £7.00 + P&P
 Body Gas Gallery Plug O Ring 
 £3.00 + P&P
 Body Gas Gallery Plug Cover 
 £9.00 + P&P
 Firing (exhaust) Valve Stem 
 £18.00 + P&P
 Firing (exhaust) Valve Cap 
 £25.00 + P&P
 Firing (exhaust) Valve Spring 
 £8.00 + P&P
 Firing (exhaust) Valve Spring Guide 
 £5.00 + P&P
 Trigger Spring 
 £12.00 + P&P

 Rohm Twinmaster Cylinder Damaged or Stripped Thread Repair
Send us your cylinder and we can repair the thread better than new with our custom made tooling and high quality, long life stainless insert or with a threaded sleeve depending on the level of wear and damage to the cylinder thread.

Opposite is shown one of our repairs in progress on a well used Rohm cylinder which came in with a completely stripped out thread.


Original Rohm Cylinders £65 + P&P
Later Walther Cylinders £75 + P&P
 New Cylinders for Rohm Pistols
We are now able to offer new cylinders for Rohm PCP models, based on a new Steyr pistol cylinder Magic 9 Design can now manufacture a replacement end plug to suit either type of Rohm regulator making your pistol eligible for competitions which require pistol cylinders beyond a specific age to be replaced. 

Steyr Cylinder Conversions
£125 + New Steyr Cylinder + P&P 

 Rohm Twinmaster PCP & CO2 Valve Cap Upgrade and Stripped Thread Repair

The photo opposite shows the Phosphor Bronze M9D Valve cap (left) along side the standard plated Brass Rohm cap.

The Standard Rohm Twinmaster valve cap is retained by approximately two full turns of it's fine metric thread, failure of the thread in the pistol frame whilst not common is not unknown, this can render the pistol inoperable. With the end of parts availability the main seal is also no longer available.

Magic 9 Design has designed and developed an upgraded valve cap which is retained by five full turns of the thread (utilising all the thread in the Twinmaster frame) and incorporating a replaceable, press fit valve seat, giving extended life. The upgrade/repair replacement cap incorporates both rear flange seal and internal valve stem seals. 

The slimmer hex portion of the replacement also solves a common problem with inadequate valve pin travel limiting power and facilitates tuning for HFT/Silhouette/Long Range Target with increased valve travel and dwell in both PCP and CO2 models. 

Fitting the M9D upgrade valve cap to a Twinmaster with a stripped valve thread gives more engagement in the unused portion of the frame threads than the standard Rohm valve cap, resulting in stronger cap retention and also quickly and effectively repairing an otherwise scrap pistol. 




£95 + P&P
 Rohm Twinmaster PCP & CO2 High Flow Valve Stem Upgrade
Fitting the M9D upgrade valve stem increases gas flow, ideal for tuning to higher power levels, increased flow can also allow a lighter hammer strike at standard power levels for faster, smoother multi-shot use in double action
                                         £45 + P&P
  Rohm Twinmaster PCP Cylinder Service, Repair & Reseal

The cylinder is completely stripped and all seals are replaced, the cylinder is then filled, leak tested and finally checked for pressure loss over 48 hours. 

Replacement valve stems now available when having your cylinder serviced and repaired, leaking gauges can usually be repaired for around £20 when undertaken as part of a cylinder reseal. 


£55 + Parts + P&P

 Rohm Twinmaster PCP or CO2 Valve O Ring Kits

Kits with genuine green front valve O ring, upgraded rear valve cap O ring, valve stem O ring and lubricant. 

For repair/reseal of leaky Rohm firing valves - includes required Silicone Grease to re-lube the O rings, valve stem and valve nose on reassembly.



£22.50 + P&P  

  Rohm Twinmaster PCP Regulator O Ring Kits
For repair/reseal of leaky Rohm firing regulators - includes required Silicone Grease to re-lube the internal and external O rings on reassembly.
                                        £12.50 + P&P  

 Rohm Twinmaster PCP Regulator Nose O Rings

Two Regulator Nose O rings and more than enough silicone grease to maintain them.

Please note that the correct procedure to prolong the life of the O ring and cylinder and regulator nose threads is on removal of the cylinder to -

(i) unscrew the cylinder one full turn

(ii) fire the pistol until gas output drops noticeably, 3 shots usually suffices. 

(iii) unscrew the cylinder fully and remove


£5.00 + P&P

 Magic 9 Design Ltd Rohm Twinmaster Tuning Kit (PCP)

Comprising a pair of carriers, assister spring, regulator shim pack and full stripping, fitting, reassembly and tuning instructions.


£50 + P&P

UK P&P £5.00 

Most EU Destinations £15 P&P with RM International Tracked & Signed

 Magic 9 Design Ltd Rohm Twinmaster Tuning Kit (CO2)

Comprising a pair of carriers, assister spring, and full stripping, fitting, reassembly and tuning instructions.


Magic 9 Design Ltd Optional CO2 Rohm Hammer Weight

The optional brass hammer weight attaches to the hammer with a grub-screw and is used when maximum power is required from the CO2 Rohm. With the tuning kit, a correctly ported and flowed valve plus the optional hammer weight it is possible to achieve power output not far below the UK legal limit


£40.00 + P&P




£15 + P&P


UK P&P £2.50 - Most EU Destinations £10 RM Airsure

 Magic 9 Design Ltd Rohm Twinmaster Tuning Service

For those who prefer not to strip their pistol we can do the whole job for you


 Prices start at an additional £65 labour when a Service and Kit are purchased at the same time.

 Rohm Pistol Service

Full strip, clean and re-lube of all mechanicals, valves, regulator etc,


£65 + P&P

Plus replacements for worn or faulty seals and/or parts

 Rohm Pistol Parts and Accessories

 An Aluminium Weaver Rail machined to fit the Rohm range of pistols, as standard the rail can be mounted in two orientations, reach-back or reach-forward allowing optical sights to be placed optimally for the shooter:


From £20.00 + P&P




 Unobtainable Parts Made To Order

 Regulator Nose and Air Valve Inlet 
The standard plated brass part can be damaged with poor handling or rough treatment and the inlet valve nozzle and seat can become damaged, Magic 9 Design now offers a replacement in Stainless Steel. 
Includes a replacement Polyurethane valve seat for the regulator adjuster screw. 

Fitting and setup service available, POA.

£55.00 + P&P 
Supplied as a Gunsmith Fit Part requiring transfer of the grit filter from the original to the new part, fitting into and adjustment of the regulator. 


With the withdrawal from manufacture of the Twinmaster guns and spare parts Magic 9 Design can manufacture to order many unobtainable parts.

Opposite is a Twinmaster Trainer fitted with a Magic 9 Design CO2 cover/Piercing Lever in Aircraft Grade Aluminium

 Replacement mag indexing spring & pin made for the Twinmaster  series 

 Moderator Adapter

Made to order, manually machined and hand finished with a lead time of around 7 working days the adaptor shown opposite top is for use with scoped non-trainer CO2 models and allows the barrel to fit close enough to the moderator primary chamber to avoid the buffeting and reduced moderator performance associated with conventional slip on adaptors. 

CO2 Models in Stainless Steel at £54.50 and Blued Steel at £64.50
PCP Models in Stainless Steel at £74.50 and Blued Steel at £84.50

 Rohm Twinmaster Match Manual Twinmaster Match Manual
 Rohm Twinmaster Trainer Manual Twinmaster Trainer Manual
 Rohm Twinmaster Sport Manual Twinmaster Sport Manual
 Rohm Twinmaster Action, Allrounder & Top Manual Twinmaster Action, All-Rounder and Top Manual