The optical sights are not lined up. To fix this, edit weaponbullpuprifle.meta in
mods\update\update.rpf\dlc_patch\mpbusiness2\common\data\ai

Find "FirstPersonScopeAttachmentOffset" replace it with this value :

<FirstPersonScopeAttachmentOffset x="0.000000" y="0.100000" z="-0.076400" />