These look and sound suspicially like the CRKT Red Dog. Shape's a bit different, but the zinc-alloy handles are the same stuff.
The 420J2 is near-junk. The zinc handles are absurdly heavy, plus they'll tarnish easily. They make stainless steel feel lightweight. The fact that they're beadblasted means not only will they tarnish easier, but trying to remove the tarnish will be rather difficult, if not impossible.
Almost any time someone brings up CRKTs or the safety of linerlocks, I have to tell the story of the CRKT Red Dog that folded on me cutting my index finger, requiring. This was 5 years ago and I still have nerve damage. I feel like a broken record constantly bringing this up, but I feel like I'm doing everybody a disservice if I don't warn them. Since moving on to quality knives, I've given away all my cheap junkers, except the Red Dog. No way would I let it fail on somebody else.
This new one has the LAWKS, which would prevent the linerlock failure I suffered. But why on earth would I want a knife that requires a secondary lock to be safe?
Trust me, you can do much, much better for the money.