[grobdriver]

how are these “universal” background checks going to be enforced?

I would be concerned about BATF&E sting operations.

A nice AR shows up on TexasGunTrader (for instance) and a meet is arranged in a gun store parking lot via text... what are the odds?

[TheBattman]

Those stings already happen, thought with Class 3 weapons and devices. So extending it to ANY firearm would be a simple thing. That’s why you buy/sell with people you know.