This build is actually unfair and probably should not exist. Most likely getting nerfed/patched soon. With Yamato's 3 and supressor (both of them slow firing rate and they stack) basically you hit ur 3 and you can 1v1 anyone without them being able to fight back. Some people are mad i'm posting the build, it is what it is, everyone is spamming it in high mmr on streams. It's not a secret anymore
you can use console command to change citadel_crosshair_pip_gap -14 to get it small but remember ur old setting as u will have to change it back when u use non shot gun heroes.