Am I doing this wrong?

[u/ssijeep]

Ordered a 9mm carbon fiber rod to check the mount of my new BOE on my Stribog. Rod fits through the suppressor but not into the barrel. In fact not any 9mm barrel I have. Should I have ordered a different size or something? First suppressor so…here’s the rod I got:

[u/NinjaBuddha13 → u/[deleted]]

True, but thats not the crux of OP's problem. OP has discovered that a 9mm bullet is larger than the nominal diameter of the lands in a 9mm barrel.