Originally Posted by
veitnamcam
Every motorcycle,4wd,moutain bike,and car I have owned the springs sagged or "sacked out" to some degree, my LN106 front springs were the worst, tried various expensive aftermarket ones and after a year they were sagged, getting them reset usually got another 6-8 months out of them.
Basicly it comes down to design, if the spring is being worked right up to its elastic limit it will sag,bet your familys life on it, if it is being worked well under its elastic limit it should last indefinitely.
Is your particular magazine spring or firing spring being worked to its elastic limit? I have no idea but on a modern firearm I doubt it. :)