I have a 5904, a little newer than yours, mine has the rounded trigger guard. Unless your planning to run a full diet of +P+ ammo through her, you'll be passing that one down to your grandchildren.
Here's mine sitting next to my son's Beretta 92FS Centurion.

IDP,

Do you suggest replacing any other springs beside the recoil spring? What mags are compatible with this pistol? I searched for mags everywhere and came out empty handed. I just hope I don't regret buying a used pistol.

Its probably an old cop gun, which means unless the LEO was a gun person, the springs are still probably almost new. Try it out before changing out any springs.

My 3913 has had over 10K shot through her, and has only had the recoil/guiderod spring changed out three times. 3rd Gen guns are tough, so don't worry about trying to baby her.

I own an 03 model - s/s slide & alloy frame. no worry of the longevity, the alloy frames are plenty stout enuff.

I would say recoil spring, mainspring and magazine springs are worth changing if you want to pay it super safe.

__________________
I miss my 4546 the most.

I just hung up with Smith & Wesson. I gave them the serial number and they said the pistol was manufactured in the year of 1989.

The retired pastor, seller, assured me the pistol is practically new, no scuff, markings, and also said the barrel is in mint condition. His profile reads he has 771 transactions with a seller rating of 100%. Not one complaint! Would you folks trust your life with this pistol, or would you perform some type of modifications before trusting it?

I do trust it with mine.

Shoot it with different ammo to build up your confidence in it. Then shoot it some more with your carry ammo to confirm that confidence. At that point you should be good to go, no mods needed.

As President Reagan once said, "Trust but verify!". Even if it was manufactured yesterday, brand new & sold to me by the Pope, himself, I'd still take it out to the range & put a couple hundred target rounds through it -- and then, at least, a box of my self-defense rounds. Then, maybe, I'd trust it.

cmr

[QUOTE=MrChubbs;136017571]I just hung up with Smith & Wesson. I gave them the serial number and they said the pistol was manufactured in the year of 1989.

My 5904 had a serial # TCP 8452. I was just curious to see if yours was similar. Mine was purchased in 1989.