Just looking at that pic, it looks like the major chip is at the leading edge, I assume an issue with rotation and tight tolerances, but it's the leading edge not the back of the lug, at that end it's pretty insignificant. There are thingsnto worry about, i dont think thats one of them.
I'm impressed that you guys are running a box of shells through them to ensure function, at the price you are turning these over for on a sale I'm thinking that's not leaving a lot for profit margin. Would love to purchase one of these myself but somewhere in life I choose to have two great kids instead of an expendable income so I'll give some props to this vendor. Hopefully these are available again one day when I have recovered from daycare costs.
Wether or not a ban and confiscation happens, it also involves compensation. Consider that regardless of that coming into force your actual risks are minimized to some level. Wether or not they give fair value is another matter, but your not going to lose full value, and it could even miss NR semi's but grandfather them.. or not..