Insert this at weapon_rpg in weapons.meta

          <CameraFov value="45.000000" />
          <FirstPersonAimFovMin value="40.00000"/>
          <FirstPersonAimFovMax value="45.00000"/>
          <FirstPersonScopeFov value="45.00000"/>
          <FirstPersonScopeAttachmentFov value="30.00000"/>
          <FirstPersonRNGOffset x="0.000000" y="0.000000" z="-0.080000" />
          <FirstPersonRNGRotationOffset x="0.000000" y="0.000000" z="0.000000" />
          <FirstPersonLTOffset x="0.000000" y="0.000000" z="-0.045" />
          <FirstPersonLTRotationOffset x="0.000000" y="0.000000" z="0.000000" />
          <FirstPersonScopeOffset x="-0.006" y="0.07" z="-0.06" />
          <FirstPersonScopeAttachmentOffset x="0.00000" y="0.0000" z="0.0000" />
          <FirstPersonScopeRotationOffset x="3.00000" y="0.0000" z="1.8000" />
          <FirstPersonScopeAttachmentRotationOffset x="0.00000" y="0.0000" z="0.0000" />
          <FirstPersonAsThirdPersonIdleOffset x="0.02000" y="-0.02000" z="-0.05000" />
          <FirstPersonAsThirdPersonRNGOffset x="0.000000" y="0.000000" z="0.070" />
          <FirstPersonAsThirdPersonLTOffset x="0.000000" y="0.000000" z="0.040" />
          <FirstPersonAsThirdPersonScopeOffset x="0.090000" y="-0.050000" z="-0.040000" />
          <FirstPersonAsThirdPersonWeaponBlockedOffset x="-0.0750000" y="0.050000" z="0.000" />
          <FirstPersonDofSubjectMagnificationPowerFactorNear value="1.025000" />
          <FirstPersonDofMaxNearInFocusDistance value="0.000000" />
          <FirstPersonDofMaxNearInFocusDistanceBlendLevel value="0.300000" />
          <ZoomFactorForAccurateMode value="1.300000" />