[@Omega Man]

True. But that is usually against one and from surprise. This is likely the entire US Naval Force - plus, as we see in the clip. Regular human weaponry, in this case, simple pistols can take-out Atlanteans. Now imagine if you're armed with weapons, and equipment designed to demolish tanks.

Plus, I do believe in having the limit of 'normal tech resistant vs getting beaten by fist' - so they can be advanced, but not too much, that getting fist-cuffed down doesn't seem out of reach.