Character left hand position is wrong using Aim Offset

Development Character & Animation
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1

Hi,

I followed tutorial:

But I made it for iron sights pose.

236514-3.jpg
236514-3.jpg1107×981 135 KB

I manged to make it works but I have problem with Mannequin left hand when attaching gun. It is not moving as expected.

Please see screens attached.

Best Regards,