I find that very often speargun design and components made for the European market, sacrifice brute strength/durability in favor of fancy appearances. I'd go as far as saying many are "dainty", with very low tolerances/inflexible as far what other components they'll work with. With Speardiver I always strive to achieve strength and good looks combined with simplicity. Too often spearfishing, with all the different factors that come into play, there is a very small margin for error, which can result in severe consequences. Making gear fancy and complicated doesn't help.
I have to admit I'm not a fan of Mark's stainless steel muzzle design, I think it falls in the above category. I just wouldn't want so much steel in the front of the gun, where I often find myself handling the gun. But if anyone's going to make it practical it will be him.
I'm an "overkill" guy so weak stuff won't work for me...
I can see the difference between the Euro and American approaches in some components/gear and this usually calls for the car analogy :)...
My point was not related to just being "fancy" but with an important gun design feature (hand placement)...
There are very well built euro trigger mechs with less height (but in this case he wanted american)
About the muzzle, it reduces the total length of the stock (why have 2 inches in the front doing nothing?) and allow the bands to sit much closer to the spear axis... I'd call it an euro approach