Purpose of the SAS mod is to give a completely new look at SWAT 4 fixing, where possible, the main game bugs and introducing new features. The SAS mod improves SWAT 4 gameplay looking at weapons, equipments and tactics of the real 22nd SAS Regiment.

ZetaRidge says

10/10 - Agree Disagree

A good old fashioned SAS gameplay on SWAT 4 TSS with this mod. Excellent! :3

No more penalties of used unauthorized force and no more annoying things like attempting to restrain suspects to might flee.