U.S. Customs Agents Seize Over 52,000 Illegal Gun Parts In 3 Months

Over the last three months, parts for firearms arrived at Los Angeles and Long Beach ports in three shipments from China, violating the arms embargo. The seized parts, valued at $378,000, included sites, muzzles, buffer kits, and grips. This seizure is significant for California's efforts to combat ghost guns, which are untraceable weapons made from old parts. The shipments were intended for a legitimate US firearms retailer, now under investigation. No charges have been filed, and the shipper remains unidentified.

What is the significance of the arms embargo mentioned in the text?

What actions are being taken regarding the legitimate US firearms retailer involved?