Strange Issue with my S410

[Brooksy]

With the silencer being much wider than the barrel, when it landed it acted like a lever and slightly bent the end. Look at it like a spanner on a nut, big area to grip and apply torque.

I would take the barrel off and roll it over a granite worktop, then look for warp on the end.

[granville]

worth putting your location on maybe someone close who could help.

[K9Calamity]

Had a decent weather day today, the barrel doesn't seem to be bent. I used fine emery as suggested and this seems to have done the trick! Lesson for the future I guess is NOT to over tighten the grub screw Thankyou!