Enjoy.

If it were me, I'd replace the recoil & mag springs, just because you never know how long they've been in any particular used gun (and LE may sometimes try to run them longer than may be prudent).

Factory springs run just fine.

Every 5K rounds fired or every 5 years (mags left loaded) is the current recommendation for replacement in duty guns.

The other thing that some owners/users (like LE users) can do that causes them some unnecessary grief is to over-lubricate the 3rd gen guns. Using excessive solvent/CLP/oils that can run up under & into the extractor recess, and into the firing pin channel, may eventually create issues (light-strikes if the FP channel becomes saturated and full of semi-congealed sludge at some point).

Pretty heavy-duty "work horse" pistols when maintained reasonably, though.

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Ret LE Firearms inst & armorer