Sam & Mace, The knife MilliePop is talking about is not an integral. The guard is slotted and sits on very small shoulders.
MilliePop, The knife in question by Bayley knives is made in a very common way. The guard is a slotted piece of metal most likely stainless steel. The guard sits on a shoulder on the blade side and is held in place by the handle material. The only thing tricky about this type of construction is keeping close tolerances on the fit up of the guard.
In the explanation of the construction of the knife it may sound like Bayley knives is doing something special. However there is nothing extraordinary about this construction method. The fact that they do not use solder may be questionable depending on just how close the guard fits the blade. Even with very close tolerances solder or epoxy at the joint is often preferred because it seals the joint.
Not to say the knife in question is a poorly made knife. I dont know I have never used a Bayley knife. I am afraid any hype from this Bear guy using a Bayley knife is just that hype.