Work-related expense for Firearm/uniform/etc

Am I able to deduct a firearm, belt, uniform,cost of training/licensing, and anything else that is needed for a job as armed security? It is not my own company.

I read somewhere on here that you are able to by going to deductions -> employment expenses. 
But when I go.. it's stating I need to be either..

Armed Forces Reservist
Qualified performing artist

fee-basis government employee

disabled and have impairment-related expenses