Reply #32: That all depends

[one-eyed fat man]

Easy is a relative term.



If you recognize everything in the picture and know how to use them, the problem is a simple one. On the other hand if you have the mechanical aptitude of a turnip and think a "flat bastard" is some kind of insult, it may be beyond your skill set.

In the picture is an AR-15 lower receiver in the process of being machined on a milling machine. It is clamped up to a right angle plate made to give an accurate surface 90 degrees to the table. The dial indicator is there to check the setup to ensure the workpiece is parallel to the table.

It is absolutely legal for an individual to build a semi-automatic rifle from scratch for their own use. There are hobbyists who are perfectly capable of metalwork of sufficient accuracy to make completely functional firearms. Obviously someone with sufficient skill to mill a semi-automatic receiver from a block of 7075-T6 alloy could certainly make a full auto receiver just as readily, but for the moral restraint of US Code, Title 26, Section 5845.

Some people are just naturally clueless, others spend a lot of time and dedication ensuring they are.