Walther Reign Left Hand Cocking Conversion

The Walther Reign left hand cocking conversion capability is a big attraction for Southpaw owners of this air rifle. Now normally, I resist the temptation to open up the air rifles we receive for review, but this case is different.

You see, the Reign’s Owner’s Manual provides instructions for how to go inside the gun for two reasons. One is to make trigger adjustments, the second is to move the cocking lever from right-to left-handed operation. We made the cocking lever conversion.

Overall, the Reign’s Owners Manual provides a good explanation for how to do this. Basically, this is a fairly easy operation. However, there are a couple of additional steps I’d like to make clear, together with some overall comments on how it went for me.


You’ll need the following tools to undertake this job:

A size T10 Torx (star) wrench.

2.5 mm Allen wrench.

2.0 mm Allen wrench if making trigger adjustments.

Very small flat-bladed screwdriver (or similar tool) to remove e-clips.

E-clip insertion tool or suitable alternative (I used a mid-size flat-bladed screwdriver.

Containers to hold the removed parts.

Let’s get started!

As I was following the instructions, first I cleared the gun, removed the magazine and proved safe. The Reign Owner’s Manual does not suggest that the gun be de-gassed before starting work. However, this would be a very wise precaution to avoid a potentially-dangerous situation if a critical part were to be mis-identified and removed in error.

Walther Reign Left Hand Cocking Conversion

Basically the Reign has a “clamshell” stock containing the action. The two sides of the clamshell are joined by multiple small screws. Their locations are shown in the photos above and below. Note that there’s two different types of screws, so keep them separate and remember which go in each location!

Basically, all the screws on the right (existing cocking lever) side are removed first. Then the left (top) side of the clamshell can be lifted off – after you’ve removed the cocking arm lever, that is.

Now the action is in view.

If you want to adjust the trigger settings, there are two setscrews to do this. The rear one controls sear adjustment, the other, trigger pull weight. I didn’t do this, but the Reign’s Owner’s Manual very wisely advises making VERY small changes of less than 1/16th of a turn each time as adjustments are made.

Then that beautiful rubber buttplate can be removed, followed by the cocking lever and return spring.

The action (less cocking lever parts is now) turned over and the two screws on the other side of the clamshell removed.

Walther Reign Left Hand Cocking Conversion

With the action removed from the stock, the cocking lever assembly is re-installed on the left side. Although not mentioned in the Reign’s Owner’s Manual, it’s pretty obvious that the bolt pin needs to be swapped to face the opposite side of the gun. Likewise, the return spring has to be swapped to the other hole in the cocking lever.


Walther Reign Left Hand Cocking Conversion

Once we have this, the clamshell stock can be re-assembled around the action. (And no, I don’t know what “MAX” means at the front of the action).

Walther Reign Left Hand Cocking Conversion

A couple of reassembly comments are probably in order…

I found it best to locate the buttpad correctly between the clamshell halves before replacing any screws. Then make sure that the metal sling mount rings are correctly located with their keys in the clamshell slots otherwise the two sides will not come together correctly. Guess who didn’t do this first time…

Also I found it best to reinstall the three screws at the rear of the stock first. This held the buttplate and sling mount rings in place while I worked around reinstalling the remaining screws.

Be careful not to loose any of the screws or e-clips! These metric parts are not very easy to find in the USA and you’ll probably need to call Umarex USA if any go missing. I worked slowly on a white cloth (for visibility), put all the screws in containers for safe-keeping and covered the e-clips with cling film when removing them to avoid unintended disappearance.

With the Walther Reign left hand cocking conversion complete, the gun looks like this. The clever magazine now can be inserted from the opposite side of the Reign with no modification at all.

Now this Walther Reign works perfectly with left-handed cocking. It provided an interesting project and I learned more about the gun. But – were I doing it again – I would definitely remove all pressure from the gun first before starting work. Safety is good!

Walther Reign UXT PCP Bullpup Air Rifle 0.25
Walther Reign UXT PCP Air Rifle