Jorge Llames is a competitive shooter. In the picture above, he is competing in the Men’s 25m Rapid Fire. He has a unique technique to locking his arm. He is double jointed and hyper extends his arm when he shoots. The picture above really exaggerates the unnatural looking bend. Here is another picture.
The gun above is a Match Gun MG2 for Rapid Fire.
You can find out more about Jorge Llames on his website.