Barrel band/restraint XM1, PR900, Stormrider.

 Specifically designed for the XM1 but should fit the PR900W and the Stormrider as they are essentially the same rifle.

 The problem that I was having is one of a wandering zero after transporting the rifle in a soft case. You can, of course, simply move the existing barrel band forward. However, on the XM1, this resulted in some movement in the stock, resulting in the safety interfearing with the operation of the trigger with the safety off.

 I tried an addional barrel band, both of my own design and one from the manufacturer. The problem with this solution is that the rifle was made in China and the barrel does not run parallel to the air cylinder. This results in introducing a bend to the barrel. Not good for accuracy.

This design allows the barrel to float. It allows for about .5mm movement in each direction, thus not affecting accuracy but not allowing sufficient movement to introduce a bend into the barrel.

You will need some M3 nuts and bolts. I used some spares from my PRUSA kit.

You may find that the barrel on your rifle is slightly higher/lower than on mine. If so let me know and I'll maybe publish designs with higher/lower barrel holes. (no promises).