If you have guns, it is wise to have some basic gunsmithing knowledge and tools. At the very least, you want to be able to maintain your firearms; it would be even better if you could make minor modifications and basic repairs without having to run to a possibly expensive or overworked professional.
The big thing these days seems to be building your own firearm. Can you do this?
Yes (most places in the U.S.), and its not particularly hard. But there are some caveats. Here are links to my series on this, using the AR-15 as an example.
Part 1 (Laws): http://www.theprepperjournal.com/2017/04/04/building-your-own-firearms-part-1-the-laws
Part 2 (Methods): http://www.theprepperjournal.com/2017/04/10/building-your-own-firearms-part-2-the-methods/
Part 3 (Lower parts): http://www.theprepperjournal.com/2017/04/27/building-firearm-part-3-ar-15-lower-parts/
Part 4 (Upper parts): http://www.theprepperjournal.com/2017/05/08/building-firearm-part-4-ar-15-upper-parts/
Part 5 (“Manufacturing” the receiver): http://www.theprepperjournal.com/2017/07/25/building-firearm-part-5-manufacturing-ar-15-receiver/
Part 6 (Assembly and Results): http://www.theprepperjournal.com/2017/07/31/building-firearm-part-6-assembling-testing-ar-15/
My recommendation for your first build was to get a complete upper pre-built. I have written another article on how to build an upper for “advanced” builders, which should be published in a month or two.
I’m also looking into other possible ways of manufacturing your frame, such as the Ghost Gunner CNC mill and/or the AR15mold.com “poured” receiver.