They left some pertinent parts out of the price discussion. Besides the machine, there are some things you have to buy. I suppose the first assembly would be the most expensive. After you have manufactured 10 or 12, you are probably able to cover the start up costs.
However, if you are making them for sale, you are committing a felony. (as I understand it).
While we can, it still makes sense to just go by an AR15 for yourself. If you are not able to own one where you live, then it’s a could bet it would be a felony to make one (but I am only guessing).
If you instructed someone on how to use the machine after constructing their own parts, and they pressed the ‘on’ button, THEY built their own gun, not you.
There are machine shops in California that do exactly that right now. Nobody has busted them and cops are their biggest customers.
It is perfectly legal to allow friends, family, and customers access to your CNC machine for a fee. In many places you can find “build parties” where you get a kit for an AK-47 or ar15 type rifle that includes an 80% lower reciever plus tools and experts on hand to aid you in the final milling work and assembly. With this machine I imagine you could sell the 80% lower and the machine time. As long as the gun owners press the “start” button no laws have been broken.
Not if you go into the business of RENTING the machine. I could see somebody buying the machine, not using it to make anything for himself, but renting, for cash, access to the machine. And keep no records of who rented access to it.