Seals and other special forces have the opportunity to carry whatever they want. Seals have carried HK, Sigs, Glocks ect. Look at the HK SOCOM built specifically for Special Operations. They don't carry it every mission but its available if they want it. Personal Preference and needs of a mission dictate what they use. All are great firearms that are capable in a combat enviroment. Lastly, The perk to being in special ops you get whatever you want usually.
