New grendel, wont fire

[Costa]

Well, I talked to Bill (who is an awesome guy and very informative!) and the people I bought it from, guys I bought it from claim its one of the first batch of his barrels without the engraving.

But didn't Bill say that it wasn't his.

I can see from the diameter behind the gas block that this is not one of mine, diameter is too long and transition angles are wrong.

Bloody "match" chamber I note! whatever that may be.

I have no dog in this fight, but if it was me in this situation I would ask the seller to disclose some sales receipts from AA for the barrels. To me it wouldn't really matter if the upper will chamber and shoot the round. They advertised and you paid for an AA barrel.