So I picked up a well loved MK-25 a while back. It seems the recoil spring is very soft so I was planning on replacing it.

Are there any others that I should replace at the same time?

Is Wolf the go to brand?

What weight should I go with?

Thanks for the help.

Hudson

Well loved = well used.

If you haven't done so already, might as well change the TBS and the slide catch lever springs while you're at it. And, maybe the decocker spring, too, but that's probably not that important.

Q,
Thanks for chiming in. Yes it is well used. Is there an online guide on how to detail strip it?

Is the 14 lb spring a good choice? I see conflicting info as to what is factory.

Here’s a picture of the gun in question.

YouTube has tons of how to videos. https://www.youtube.com/result...l+strip+the+SIG+Mk25

But, you don't really need to detail strip everything, just semi-detail for those springs. And, why not just use factory recoil spring? I have a factory Mk25 parts kit (minus the grips) NIP that member WJR kindly gifted me a couple of years ago when I bought his P226 Combat. I no longer have the gun and really have no need for this kit. All yours, if you want it. Just email me your shipping address.

Q, thanks for that generous offer. I sent you an email.

I have a different opinion.... if it ain't broke then don't fix it... especially just because you can....

quote:

Originally posted by Blume9mm:
I have a different opinion.... if it ain't broke then don't fix it... especially just because you can....

See, I used to think like this. Let me explain why that is no longer the case. I will agree that, if you bought a gun, from a private individual, that is NIB/NOS/LNIB, I wouldn't do anything. But, if the gun has been well used, like OP's case, you really don't know. It could well be fine. But, it could also be at the stage, or passed it, of small parts exceeding useful life. And, if you keep using them, you only risk harder pounding on your pistol unnecessarily, which could lead to its premature death. This is from personal experience with the Nickel P228 I tested last year. Spring are cheap. Replace them, when you're facing the unknown. OP's well used gun's recoil spring is "very soft". There are no good reasons not to replace it, although it still might cycle the slide.

^^^^I agree 100%. Springs can be found relatively inexpensive and are cheap insurance to make sure your gun will last and function properly. When I buy a well used gun, I immediately order new springs for it. I even do it on some guns that look hardly used,just in case.

easy and cheap to replace with the "tune up" kit
all factory parts. https://www.midwestgunworks.co...mgwi/prod/226-9-PKIT

Okay, I understand .... so how does one determine a spring is 'soft'?

You could just compare it to a new one or measure the length compared to a new one. A spring inside a gun will compress a little on it's own but you can see the difference in a new one. They can be found cheap and it is always good to have a spare or two.

A Sig P226 parts kit is at the Sig Store of $29.00.

I’m sure that if I mention SIG’s maintenance schedule someone will claim that it’s because they’re getting rich off the recommended replacement parts, so if you believe that, this isn’t for you.

Whenever a company recommends regular maintenance for its products, there is the risk that it will be perceived as an admission that the products aren’t all that good and won’t last unless they’re taken care of. On the other hand, if they can convince users to maintain them properly then that enhances their reputation for durability and reliability. So, what to do?

I like knowing what the factory recommends to keep a gun like the P226 functioning as long as possible. Even if I probably won’t ever shoot most of my guns enough to wear them out without following the recommendations, doing so helps eliminate at least one thing to be worried about.

I also recommend using factory replacement parts unless there is a specific reason (that we know and understand) to use something else.

Dang it! You folks have convinced me.... now I have items I need to buy.