That's not correct its 1/2x20 unf.Alpha1 wrote:The thread turned out to be 5/8x20tpi.
Any way its fitted to the rifle and the owner is happy with it and that's all that counts.
And I gained another little bit of knowledge the first bit was imparted by Ovenpaa. The second bit having never owned a silencer I got to dismantle one and see how they work then fettle the problem and reassemble it and fit it to the rifle.
![reading teanews](./images/smilies/grumpy.gif)