I have had a Taurus PT-99 for 15 years or so. Bought it used so I don't have any clue how old it really is. It was used for house gun and just shooting till Kansas gave us concealed carry. Two weeks ago at the range, the guy running it asked to shoot it. After 2 mags, he said it needed new springs. I have shot a dump truck of ammo thru it and never thought about replacing the springs. Last Friday, I called Wolff. Told them I wanted one of everything for the gun, also a 3 pack of mag springs. Mailman brought them yesterday.
Some of those springs are a to replace, but I got them done around midnite. Man, were some of them wore out. I never noticed it. Went downhill very slowly. Took it out this afternoon, feels like a whole new gun. There is no longer any trigger freeplay, the slide does not shift around any more, hammer does it's thing very good. I never thought about springs. Bet I'm gonna replace them every year or so now.