"a well regulated militia ..."

[Amishman]

6. the originalist interpretation make the argument that well regulated had a different meaning in 1776

One very different than what would be the modern read. They argue that in 1700s in that context it would be more synonymous with capable, well trained, or even well armed. In digging into it, that argument might hold some water.

However, the 'well trained' interpretation does offer an interesting avenue to restriction. Require the nuts to train and demonstrate proficiency before they can own an assault weapon. Would add months of delay to buying one and a lot of them probably wouldn't want to put in the work.