I teach many candidates whom are applying for the MOD police. With the MOD they require you to pass the fitness test and firearms test, normally the day before your assessment centre.
The firearms test consists of you handling an unloaded MP7 handgun and they teach you a simple drill with it; they are simply looking to see if you can follow instructions for safe handling of the gun and that you get the hang of moving the parts of the gun. Easy! It also gives you the opportunity to see if they really want a career where they will be carrying a gun 70% of the time.