Well, at least you know...
But hey - it'll still work fine, I bet, and you don't have to open it up all the time to show off.
My EDC AR is on the same lower, but I didn't bother milling that far back on mine.
I have decided I'm no longer needed as "The Village Idiot".
There are plenty around these days!
So I'll be changing my nickname sometime soon...Stay tuned!!!
Unless you start hanging out with @ReservoirDawg10 , then you'll need a better scope, and better mount, and a better trigger, and a better NV scope, and better bipod, better ammo, better stock, and you'll need to learn to shoot better too.