I believe Buck still makes their knives in the USA.
I believe that’s correct. From Wiki:
“In 2005 the company relocated to Post Falls, Idaho. Leaders of the San Diego business community considered this move a blow to San Diego County’s economic landscape and a symbol of the state of California’s problems in attracting and keeping businesses.” (LOL, California wins again!)
That said, I’d consider 420 about the lowest grade of steel to make a good blade these days. (Cheap, though.) Most have moved on to at least ATS-34.
Had a Buck folder as a kid in the ‘70s. Loved it, lost it... These days my constant companion is a Chris Reeve large Sebenza. Best. Folder. Ever.