Firearms Safety Training, Get your Mass approved certification for your FID or License to Carry Class A or B At Burlington Firearms Safety Training School we put our emphasis on Safety, Safety, Safety. All of our instructors are NRA and Mass State Police Certified to give you the best training possible. This is the fastest way to get your safety certificate, Our classes are between 2 and 4 hours long and we have both week nights and weekend days available for you, we have a maximum of 4 people to a class so we can give you the most attention possible.