Because the FBI arrived on time, the armored vehicle wasn't breached by the robbers and the guards inside were still safe within the thick, bullet-proof vehicle, temporarily out of danger.
The robbers' vehicle was parked diagonally in front of the armored truck, creating a makeshift barricade between them as they confronted Harten and his team.
Jimmy parked his police car behind Harten's location, crawled out bent over from the driver's side, opened the trunk, and retrieved a spare M16.
Jimmy was part of the Support Team, his police car always stocked with rifles. Having practiced extensively, he had switched from the standard shotgun to an M16.
Jimmy bent down next to Harten and asked, "Harten, anyone injured?"
Harten, without looking at Jimmy and continuing to return fire with his pistol, responded, "Not for the moment."
Jimmy fired two shots towards the robbers' position and ducked back, "Didn't you all bring any weapons? Why are all of you just using pistols?"