Quoted: There is perhaps one time when you should think about storing it up. Home defense. I don't have personal experience with it, but I have read several times that turning on an electronic optic makes noise. If you leave the backup sights up, you can simply flip the front cover off (having left the rear cover open), and use the backup sights. Of course, you can turn on the sight, if you think it won't be heard.
This may be obviated by the noise your gun makes when you chamber a round.hock.gif
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I guess a good blade would be your best option if you are worried about being silent but deadly. Of course that would mean you might have to invest in a ninja suit and learn how to leap from the rafters. I saw it done on T.V. once, so it's got to work.
I'm kidding with you of course, but I know I make more noise walking on a squeaky floor than my Aimpoint does making that "click" sound.
Oh, back on the subject. Is the question about weather keeping the spring under tention on the ARMS #40 by keeping it down (loaded) over an extended period of time? I don't have the answer, but I have not noticed deterioration on my unit and I have kept it down while not in use as a back up sight for two years now.