IK for hands

Hi.I have a question about IK solution. So I have a aim idle animation(just a guy pointing a rifle) and I made a simple IK system to look at the cube. The chest and spine,head are looking at the target just fine, but how would I make hands to look at the cube position but still hold a rifle(point correctly too)? For spine and chest I used the SetBoneLocalRotation(bone,rotation), but if I use this method on hands it makes hands look very weird(and funny xD)