Sharing these images with you was a bit of an experiment, and this thread is magnificent. We sometimes hesititate to show in-progress images, because it can be difficult to see how the final figure emerges from the components and assembly. It's not a 12-step program, it takes a LOT more steps. Have faith...
Han's arms are made of the same material as Luke's - PU (a dense but flexible material), with a wire inserted inside. Dave is right, once the belt is dressed on the figure, his arms will be reposed so that the right hand is grasping for the blaster, and the left is ready to tuck into the belt. When you receive your Han Solo figure, you may need to do some slight adjustments to get the most natural, 'Han Solo' pose.