Not all Blackjacks are created equal.
The American made knives are indeed made by Bark River, the majority in A2 Tool Steel, the 155 Necker is the only one I know of in 154CM.
There are also some less expensive Chinese made Blackjacks models available in a variety of steels.
I have had a Blackjack Necker for over a year now, and it has served me well.
BJ 155 - middle knife in photo.
I carried it as a necker over the winter and found it quite convenient.
Currently it's out in my vegetable garden, going through some long term testing, it will be out there until the end of the growing season exposed to the rigors of dirt time and the weather.
I also have some of the Blackjack Classic Series in A2, first rate knives. :thumbup:

:thumbup:
Big Mike