To educate yourself in the work of gunsmithing, your easiest course of action is to look for one of the many gunsmithing schools in your state. A certified gunsmithing school is able to offer you hours of schooling in a gunsmith's workshop, doing work under the guidance of a skilled tutor. When you finish the programs at the school, you'll have the credentials that will be desired by potential employers in the gunmaker's market.
Simply taking an on-line course is not really enough to obtain employment with a gunmaking organization, and these types of businesses aren't in all likelihood going to hire you if you don't have experience training under a qualified instructor inside a professional workshop. As you do not have an instructor overlooking you, there isn't any guarantee possible that you'll be able to safely learn the craft of gunsmithing, and at the same time, you most probably won't have access to the machines required to produce guns that an accredited gunsmithing school's workshop would have. Even though such courses might have their place in strengthening your gunsmithing skills, certificates acquired for concluding such courses are not going to offer the same weight that accreditation from an licensed gunsmithing school can supply.
An alternative to locating an accredited school is contacting an established gunsmith and studying under them. There is certainly much to be said about learning the craft directly under a professional in the field. Having said that, there are no guarantees that the gunsmith you are working under is capable of teaching, and should you not comprehend the craft well, you may receive a second-rate education. Additionally, an apprenticeship usually won't come with certification, which will make it much harder to find and impress would-be employers.
The many benefits of a gunmaker's school will outstrip those of quick online courses. Unlike an armorer, hired to just construct factory-made parts for government or military organizations, gunsmithing involves solid knowledge of a large number of fields, such as woodworking and ballistics. Hands-on experience in a professional shop kept up-to-date with industry specifications will prepare you for your work, and assure a level of proficiency with your craft that can be tough to acquire otherwise. Likewise, since working in a workshop can be hazardous without a thorough understanding of the specific equipment, having a trained instructor capable of supervising your learning will be able to reduce the chance of harm involved when working with such machines. Since safety standards within the gunmaking industry are high, learning them in a school setting is a smart thing to do.
That being said, your best course of action for a career in gunsmithing is to find an accredited gunsmithing school. The many benefits of training from experienced industry experts, time spent in professional workshops, and accreditation that originates by successful completion of the course, will follow you into your career.