“Did you see what kind of weaponry they had? Have you seen what we’ve got? There might be more of us but believe me, you don’t go into a firefight with nothing more than a rifle, a handgun and a shotgun. Besides, now we know what we’re dealing with. Six people. We take them out on our terms.”
They would have had more than one handgun because it said earlier that the two Rangers inside were armed. And I'm willing to bet that the rifle the first Ranger had wasn't the only one available at the Ranger Station for 3 Rangers!!!