Sounds more like the thought police action than any weapons laws being broken.

Marina police received a tip about “concerning online postings” allegedly made by 21-year-old Ryan Keating.
At the Marina home, police said they found 2,500 rounds of ammunition in various calibers; two shotguns, one handgun, and three rifles, all legally purchased.
Investigators also found two “ghost gun” handguns and two “ghost” AR-15 rifles in the process of being manufactured. Numerous firearm parts and a 3D printer suspected of being used to make more firearm parts were also located, police said.
Four legally purchased handguns and 2,000 rounds of ammunition were located at Keating’s Pacific Grove home.





