Borescope (Teslong 45 ") from Amz.
showed lead in my ROA and surface rust in a TC .54 that is cleaned regularly with others while waiting for next range time. I should have bought one a long time ago.
I'm hoping vortex will pick up the slack on producing silver scopes. Leupold has stopped making them a while ago, and the prices for them on eBay have tripled. One company is actually cerakoating the blue scopes silver.