Here is a simple argument to support that stance. Under the 2nd amendment I have the constitutional right to bear arms. If I want to purchase a suppressor to limit hearing damage while firing my weapons I have to pay a $200 tax, send my fingerprints to the FBI and wait 6 months to a year and sometimes longer before I can take possession of my suppressor. There are no similar restrictions on the right to vote or speak freely. The same rules apply if I wanted to add a stock to my AR 'pistol' which currently has a pistol brace or if I wanted to add a small piece of metal to make it fully automatic.

I still do not see how any of these things are a poll tax. A poll tax is something that inhibits your right to vote by charging you money. For example, requiring a government-issued ID may be construed as a poll tax.

Are you arguing that regulations and taxes on guns and accessories are LIKE a poll tax because they inhibit exercising your interpretation of the 2nd amendment? If that is the case, I would argue that it is different as the 24th amendment specifically outlaws poll taxes and there is no similar law or amendment around firearm accessories.

Yes, I was arguing that they are like a poll tax. The 24th is a very good point. Is the right to vote even explicitly stated in the constitution? Is that why the 24th was required to prevent poll taxes?