The “Standard” KJ Shadow 2 outer is the same as the real steel version (will drop back when blow back).
The stock outer barrel angle is not perfect with strong recoil spring, so the slide return will keep on hitting the outer barrel & break very soon.
Clarence has designed a new outer barrel to fix the problem!
It will not drop and keep the barrel at the same place even when the slide is moving.
So no more worry about a flying outer barrel when shooting!
The slide moves without friction when blow back, so accuracy is improved.