I don't know about Glock but because after the slide is worked to the rear and the hammer is set against the sear (the hammer being under tension by the mainspring), HK recommends that the "pistol (the model P2000) be cleared and the hammer dropped on an empty chamber prior to placing the pistol in long-term storage." A reviewer of this pistol notes, "This is probably a very good idea, as it is not advisable to place any device in long-term storage with springs under tension." I wrote a letter to HK requesting an explanation as to what they meant by "long-term" and the reply I received was sort of a canned response, reiterating the need to "deactivate" the pistol when storing it for long periods of time.