Ran across a BYF 43 the other day and now I'm puzzled. The rifle as a whole was matching except the bolt. Bolt body matched(with WaA) receiver but nothing else(mixed WaA as well). This got me checking and YCGG shows in their article's examples that there should only be the SN's on the bolt pieces, but Law's BotW shows the bolt pieces should have both WaA's and SN's..Which source is correct?