It's not just recent. It happens every election cycle. Remember when Obama decided all ammo production should go to the military? We have another election in 2024, and I'm sure it will be ugly. Start your ammo hoard NOW.
I have been building a similar rifle with a 16" BA barrel, "midlength" system, using an A2 front sight block. All locations were perfect, until I started shopping for a handguard.
Well, shooterrex's FSB looks identical to the one on Brownells site. Assuming that they just changed the FSB without changing the gas port location in the barrel means it should work. They probably deleted the bayo lug for Commiefornia. I could live with no bayo, but I do wish they hadn't removed the adjustable sight.
Here's a pic of the box from 80percent arms I got today!