Hello - Can someone explain to me – in very simple terms - the difference between a “recoil-operated” and a “blowback-operated” pistol. The only thing I can seem to figure out is that a recoil-operated pistol (like a BHP, 1911, Kahr, or Glock), has a barrel that pivots or swivels or moves to some extent when fired, whereas a blowback-operated pistol (like a Walther PP) seems to have the barrel permanently affixed to the frame, with no movement when fired. Am I right, and if so, tell me more as to how they actually work (simply). Thanks