That article - setting aside the usual specious bullshit of the Brennan center - is about PRIVATE militias vs STATE militias, and about them being regulated. And yes, obviously the state has a significant interest in the limiting of private armies within its boundaries.
"The right to keep and bear arms" by such a (state) militia SHALL NOT BE INFRINGED.
This certainly means that militia members should be able to keep (ie own) and bear (ie wield) arms, yes?
Therefore, all US men 17-45 who are or who are in the process of becoming citizens should be able to keep and bear arms without restriction.*
It's sort of a weird take for you to be so blatantly sexist in 2026 but you be you.
*https://www.law.cornell.edu/uscode/text/10/246
(a) The militia of the United States consists of all able-bodied males at least 17 years of age and, except as provided in section 313 of title 32, under 45 years of age who are, or who have made a declaration of intention to become, citizens of the United States and of female citizens of the United States who are members of the National Guard.
(b) The classes of the militia areâ"
(1) the organized militia, which consists of the National Guard and the Naval Militia; and
(2) the unorganized militia, which consists of the members of the militia who are not members of the National Guard or the Naval Militia. ...that's all men 17-45.