These officers are members of a particularly well funded SWAT Team
They all have high end kit, from helmets, micro plate carriers and MCX carbines - with holographic optics and Hydra mounts, One member has a ballistic shield, while another carries a shotgun for breaching.
As well as being 'high speed' in terms of their equipment, they are also intended to represent a team that has been called out in an emergency, so they are all wearing more civilian style clothing, that can be painted as 'tactical' or as civilian clothing.