Hrrmmm....If I remember correctly, and it's possible I either don't, or this is from before I was into them.
The bvss were all solid stainless.
It might be a custom build on an older reciever as the bolt handle doesn't look like an oversized one, and also doesn't have the knurling on top, like the standards.
The stock and barrel could have been bought as a set from someone who was modifying their rifle.
Again total conjecture based on what I remember.
BUT if for some reason that's how it turned out, I'd check headspace, as I've never seen the lettering match up properly after a rebarrel without some work, or the headspacing being a little off.