Shoulder holsters offer a number of benefits while you are out in the field, whether you are a professional bodyguard or a highly trained member of the special forces.
The easy access to a users weapon offered by shoulder holsters is extremely convenient. No matter the situation, people are able to quickly draw their weapon. The convenience offered by shoulder holsters is also incredibly valuable, keeping weapons out of the way, making them easier to conceal, and not having to worry about them bouncing during pursuit.