One improvement the company could make. The first is to have CB radios, so they can simply pick it up, press transmit, and check in or ask for backup - that was "call Josh and Robbie, see where they are" - asking for backup. That's quicker than picking up a mobile phone, scrolling through to get the number, etc. As well, CB can be used while still looking around, whereas the phone requires you look down while dialling. And a CB can have speakers so that both people in the vehicle can hear the conversation, or one can handle the handset while the other one talks. This isn't a huge difference, perhaps as much as a minute, but a minute can be a big difference in a situation like this.
The jackers could have improved their tactics, too. Firing at a vehicle from behind or the side is not going to make it stop - you need to block their front, the direction they're going in. One vehicle in front, one on the side, box them in. You also want to minimise shooting; if the target knows they're dead no matter what, they might take some of you with them. If they know you want the gear and not them, they may give up the gear.
Notice that the exact calibre etc of the weapons involved wasn't an issue here - only whether they were able to penetrate the armoured vehicle, which being smallarms they weren't. The driver told his partner to take the rifle not because of calibre or muzzle velocity, but because it has a larger magazine than the pistol, has a more rapid rate of fire (and so could suppress them until help arrives), is more accurate, and has a better chance of penetrating the jackers' vehicle, or body armour if any.