Originally Posted by Schmitti
You've got an extra 3/8" of gun that you could get rid of just to accept an AC threaded barrel.. for all the light weight lovers, you ditch the unnecessary portion on the barrel and you lighten the gun and make it shorter.
manike alluded to that in his post.
That is why WDP changed their threads IMO. Never seen any writing one way or the other (and never owned an Angel to inspect) but it looks like that is what they did.