lhump1961
US Veteran
I'd have bought a P239 during the armorer class myself if they'd been more reasonable on the LE discount. It was only available for guns ordered during the class, through the reps, and they wanted something like $650 for a standard P239 at that time. SIG's are fine guns and all, even if some of their assorted wire springs require some periodic attention for replacement, but that was a little pricey just for something to supplement my 3913 at the time.
As older 3rd gen's start to pass 10K-12K+ rounds fired, it's not unexpected that they may require a new ejector & extractor. Easy and simple repair for the factory, an armorer or a smith familiar with the guns. Simple parts to keep in stock, too.
Much less common might be a worn hammer or drawbar. Older drawbars (with sharper corner cuts) might crack at either back corner or in the middle (behind the disconnector tab) after enough time & wear.
The 3rd gen's that get the most wear & tear seem to be the .40's (unsurprising).
The TSW's incorporated some features which have seemed to help reduce wear & tear issues and increase service life.
In general, replacing recoil springs helps keep guns running and reduces battering & accelerated wear. Hardly surprising. (Even in my last Glock recert the instructor made the comment that replacing recoil springs assemblies helped keep guns alive.)
Properly keeping the rails lubed helps keep guns in good condition, too (especially alloy frames).
I've have a bunch of repair/spare parts I've collected over the years, but it's not often I have to repair a 3rd gen gun. I remember when newly trained armorers had to wait and take turns for a chance to practice their skills in replacing extractors & ejectors in our aging inventory of original 3rd gen's. It wasn't until the guns were reaching 12-16+ years of service that we started seeing a small of them showing signs of needing new extractors & ejectors.
New recoil & mag springs can help prevent a number of problems when it comes to wear & tear and functioning.
So can PROPER cleaning & lubrication. Excessive solvent & oil can create its own problems ... as can lack of cleaning and lube.
As an armorer I've had to resolve significantly more problems caused by the owner/user level maintenance than by actual gun/parts problems.
FWIW, while armorers are still told to replace recoil & mag springs at the 5 year (left loaded)/5,000 rounds fired interval for the compacts (3913/4513/4013, etc), I still prefer to lean more toward replacing recoil springs at 2,500 - 3,000 rounds, or less, in my own guns of those models. I replace the mag springs closer to the normal recommendation (which may mean at every other earlier recoil spring replacement).
Just some thoughts and observations.
On the subject of recoil springs...what is the proper weight for the 39xx/69xx series for replacement springs? I see them from 15lbs up to 20 lbs.