From Shooting Sports Retailer:

One of the most popular outlets for selling many of the parts to build an AR-style rifles says it has rules banning the listing of so-called “assault rifle” components, adding its regulations are in line with laws in its home state of California.

But a news investigation into the sales of AR parts on the world’s most popular auction site eBay shows many sellers either don’t know the rules or tweak their listings to circumvent algorithms alerting the company of the banned items. And despite officials at the company learning of the parts sales, the items remain on the site for weeks despite the rules.