Alan Waters

Has anyone read his books?

https://officialjackcarr.com/mk11-12-an-urban-snipers-best-friend/

Ordered one. Amazon seventeen dollars.

https://gundigest.com/military-firearms/the-fall-and-rise-of-the-ar-10

Just put a Timney Calvin in my M5. 1.5 lbs.

Thank you all for the welcome.

Been wearing one for about a week. I like it.

May not happen in our life time but it will happen if Jesus delays his coming. In 1789 it happened in the French Revolution. If you don't know the history, basically, the common people removed the cancer of aristocracy by removing their heads on the guillotine. The cancer in this country is the news media /liberal left.

Well, I am embarrassed to say it has taken 21 days for the light to come on at 2 am this morning. The statement above is true. However, what I did not see was if the chamber is moved by the method described above the barrel extension lugs also move an equal amount so the headspace would remain the same. Obviously, I am not a smart as I thought. My apologies to all those who's blood pressure spiked during the exchange. Regards to all, Alan

http://riflebarrels.com/shop/in-stock-barrels/armalite-ar10-308-win-20-finished-drop-barrel/

Thank you for your service 11 Bravo.

Did you clean the barrel good before shooting?

Ok,

Well, the whole conversion is not about how headspace is measured. It's about how to reduce the distance between the bolt face and the rear of the cartridge which is headspace.

No doubt about that. Its a steep learning curve for me.

We are only talking about a .009 setback. Should not affect the BCG.

I'm not measuring the headspace between the the barrel extension and the chamber. That is not headspace. If you set the barrel/extension back it locates the chamber closer to the bolt face.

Agreeing that the barrel and extension become one after proper assembly, if material is removed from the rear of the barrel extension flange, the chamber will move rearward an equal amount. You could get the same effect by setting back the receiver face.

That is incorrect. Setting back barrel extension does not turn the barrel. The barrel is pinned on top so the only direction it can move it to the rear. You may have to deepen the pin slot.

Have to disagree on the barrel advancement. How could the gas port advance more on a large diameter barrel? If you set the barrel back enough to index the gas port 90 degrees it would not matter if the barrel is .750 or two inches in diameter. The distance traveled would be greater for the two inch barrel but it would still be 90 degrees.

You are correct. I'm still thinking in bolt gun mentality. It would work if the set back was done on the barrel extension flange would it not?

Thank you. Been thinking about those.

I was not familiar with that set but it appears they are doing the same thing that can be done with the feeler gauges.