[T.B. Yoits]

From the article: 9. Adding to the common use argument. When you build an AR, you’re adding to the stock of the most popular rifle in the country, making it that much harder to ban because it’s “dangerous or unusual.”

There is no restriction of the inalienable right to keep and bear arms based on whether it is in "common use" or not.

That said, one can buy a stripped lower AR polymer receiver for as little as $40 (or aluminum around $60). Since the ATF considers the lower receiver as the firearm, you can bump up the AR buying numbers without breaking the bank, nor going through the time and effort for full build-outs.

[Rinnwald]

There is no restriction of the inalienable right to keep and bear arms based on whether it is in "common use" or not.

Yeah, in a real world for grown-ups you would be right. Unfortunately, we don't live in that world.

"Common use" protects what we've got, but stifles future innovation. At least it's better than the emotion-driven arguments coming from the left, which, of course, are just cover for a Marxist dystopia.

[MtnClimber]

I went with the 80% lower route. I have the jig and the milling/drilling was not difficult.