So far it’s a lawful order. Burden of the service member to prove it’s not (flips the burden of proof because all orders are presumed lawful under UCMJ Article 92, so that would be an affirmative defense). That said, unless some commander really wants to make a point, he/she is not going to push for a general court martial and dishonorable discharge for refusing the shot. Even if convicted and given a DD, likely would not be upheld on appeal minus significant aggravating factors.
Colonel, USAF TJAGCR (ret)
Thank you.
Thx Colonel. To the point and enlightening.