We'll put this in the good to know category.
Basically HTG designs are among the more quiet silencers. They don't weld their rifle silencers, and I would never buy an unwelded rifle silencer as it is too easy to blow up. As for their pistol silencers -- again -- they can sound good. However, he has not figured out how to make a booster properly and it might break your pistol. It is one of those things were a more experienced silencer company could make a good silencer using some of his technology if they combined it with better construction methods and booster design.
A welded can simply can have a higher strength to weight ratio. So for any given strength, a welded can will be lighter. Case in point -- SRT cans are generally quiet but they are not light and they are not welded. However, as you say -- they should be durable enough for most uses.
