The SW/SD magazines are interchangeable within caliber (watch out for different thickness baseplates on some versions), and the trigger springs interchange. Not much else. The sears and sights are completely different.I also have a sw40ve (very recently acquired). I'm trying to learn and decode the different nomenclatures, like the difference between sd40ve vs sw40ve? are mags interchangeable? etc, stuff like that. interested in sight options though I read the front sight is "fixed" to the slide. fired it on the range today without any issues.