I've been lurking around here for a month or so, and finally came up with a few questions I'd like some insight/advice on. First off, this is more of a general question, I was wondering about keeping a magazine at full capacity over extended periods of time. Does anyone know how that affects the spring in the magazine? Could mis-feeding ever occur from a mag that was stored at full capacity for while (constant tension on spring)? I'm sure most of us keep a few mags w/ defensive loads ready in the drawer w/o ever using them. My second question is how difficult is it to install Trijicon night sights on the P99? Does it require professional installation to get an accurate mount? Or can anyone more or less install one (good price at ultout.com - saw them for $78.49)? I would assume Trijicon is one of the more popular manufacturers out there, are any of the other makers just as good or better (Meprolight, etc)? If Trijicon's have an average of 12 years life expectancy, is there a possibility that you can recieve a set of sights that have been sitting around for 5 years, thus only providing 7 years of service? Do night sights come with manufacture date? Last, I know there was a thread before on sprinco's, but it seemed to end without much feedback. Anyone ever install a sprinco recoil reducer on a P99 9mm? Felt any difference? easy to install? This should be a follow up on that post, but I wrote S&W regarding the steel guide rods and they answered back with a "we never offered steel guide rods for the P99"...odd. All that being said, I have one item of insight that I never saw much information on...Promags. They do not seem all too great for Walther P99's. Since they were such inexpensive alternatives to Mecgars, I thought I'd pick up a bunch for the shooting range. I immediately noticed harder mag release pressure (even on empty mags, forget full cap mags), and for some odd reason after the 7th round, if you shake the Promag it makes strange rattling noises. If it's empty, or has 6 rounds or less, it won't rattle. I'm dumping my Promags and sticking to strictly Mecgars. Anyway, thanks in advance for reading the post!