Instead of the his deploy-able shield, which looks amazing I might add, Its too situational and limiting.
A better idea would be to give him a large shield to protect himself and others from incoming fire/nades etc.
IE. Use the models for the deploy-able, have him bring the two shields from behind his back, link them in the front with a small slot to see through in the middle. (His only shootable area). the shield would also extend around his side as well.