Located at the back right of the PMR should be a screw. It will proberly be recessed into the milling (Thats why you might not be able to see it)
This is called the gas passage blocking screw. Never normaly touched.
What i think the problem your having is due to the bolt.
What you need to do is have a read through the manual, and that will show you how to take the bolt out, and how to clean/lube the bolt. Once you have done that im sure the leak will stop.
But if you cant get to the manual then: Take the right allen key, unscrew the bolt from the back carefully, take out the bolt. You will now see there are 3/4 small screws holding the back cap in place, un-screw those (dont loose them).
Take the front oring off from the bolt. Unscrew the can from the mainfold. Then you can get to the bolt sail.
Make sure all orings are fine on the 4 parts of the bolt.
Clean the bolt, relube with dye lube that came in the box. (Not to much lube tho!)
Then reassemble, making sure you have the 3/4 screws back in place with the back cap.
(Note) Also make sure! There is a screw that sits at the buttom of the bolt at the back! That is soposed to be there!!! Please make sure that fits in the groove in the body of the PMR. You will see it when you take out the bolt!
Failing all this, send it to me and il do it for you. Or Email
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eurotech@dyeprecision.com
Matt (hope this hepled)