Logically, if he had to use it, he shot at terrorists. They either fled, or died. If they died, logically, he picked up their weapons and used them against them. So then he would have fully auto rifles and grenades, which is how he would be able to successfully go back a number of times and save people.
Yes, he could have just gone back with a pistol, or even empty handed, for that matter. But to get so many people out from going back many times, being military he surely would have been thinking about maximizing his weapons.
And that's why the MSM really doesn't want to talk about what he did - it's literally the story of how a single gun can win a war.
And think about that - what if Homeland Security requested all American be armed at all times, and did *real* "terror drills" where they walked civilians through emergency defence tactics against MUSLIMS shooting people in a public space - how to hide, how to get a fire position, how to get their weapons and use it against them. How about the ATF teaching Americans familiarity with typical Middle Eastern weapons and explosives, so that they can be used against the MUSLIMS in an ISLAMIC mass-murder attempt?