You completely underestimate the skills of a Seal. Their whole concept is stealth and being able to sneak up on you. There is no way an auto weapon is going to help you. He'd make it to cover or concealment, ditch you, and then the stalking would begin. You'd hear him sharpening the head of broccoli to a fine razor edge, and then... nothing.
Unless you have him strapped to a table or chained to a tree, you'd be toast.
Other than that I surrender.
justshutupandsurrender.
;^)