CM9 Recoil Spring life

[tony k]

How often do you replace the recoil spring on your CM9 or PM9? Does the dual recoil spring assembly last longer than a single spring setup? My CM9 has somewhere around 1000 rounds through it without a failure. Ammo types include mild target loads all the way up to heavy +p loads. This is my EDC and I want to keep it in tip top running condition.

What about other springs such as the striker and the slide stop spring?

Thanks!

[Rubb]

As an EDC I change my outer spring only at every 1500 rounds.

https://www.gunsprings.com/KAHR%20ARMS/cID1/mID29/dID340#185

[tony k]

As an EDC I change my outer spring only at every 1500 rounds.

https://www.gunsprings.com/KAHR%20ARMS/cID1/mID29/dID340#185
Thanks. Will the pm9 springs work in the cm9?

Sent from my E6782 using Tapatalk

[Rubb]

Yes.
I'm still 300 rounds away from replacing the spring for the 1st time in my CM9, but the Wolff replacement fits fine.
An original PM9 blunt spring fits fine as well.

[Bawanna]

The blunt nose should fit fine, but probably not the other way around. The new style would be a bit tight in the blunt nose.

I'm convinced in my head that recoil springs will go much longer than the recommended round count which as I recall is 1200 to 1500 rounds.

I think the spring will tell you when the time comes. I've never replaced one myself cept for a very old Hi Power which needed one very badly.

That being said springs are pretty cheap and why take the risk especially on a daily carry gun.

[CJB]

I'm convinced in my head that recoil springs will go much longer than the recommended round count which as I recall is 1200 to 1500 rounds......why take the risk especially on a daily carry gun.

I also agree with the Col. on the round count, and that's probably a conservative figure on Kahr's part (it it was them who sourced that info).

I disagree, and think BOTH springs should be changed, as they need to work together in a stacked spring system. Just my little though, and I know Wolff doesn't sell the inner spring. Kahr sells the assembly! If you have a "why take the risk" point of view, changing both springs seems prudent, as both will lose their tension with use, and both are needed.

And... as a bit of a reminder, part of the "break in" is getting the recoil spring (assembly) tension to its design point. If you put in a new recoil spring (or assembly) you're at least partially "starting from scratch" again with break in, and a few boxes of ammo through the pistol is also prudent, if nothing else than to maintain confidence in its operation.

[RonW]

I believe it's in the Q&A on Kahr's website, they suggest changing their recoil springs every 2,000 rounds.

[CJB]

Forty boxes of ammo... yah that or fifty sounds about right.

[tony k]

I also agree with the Col. on the round count, and that's probably a conservative figure on Kahr's part (it it was them who sourced that info).

I disagree, and think BOTH springs should be changed, as they need to work together in a stacked spring system. Just my little though, and I know Wolff doesn't sell the inner spring. Kahr sells the assembly! If you have a "why take the risk" point of view, changing both springs seems prudent, as both will lose their tension with use, and both are needed.

And... as a bit of a reminder, part of the "break in" is getting the recoil spring (assembly) tension to its design point. If you put in a new recoil spring (or assembly) you're at least partially "starting from scratch" again with break in, and a few boxes of ammo through the pistol is also prudent, if nothing else than to maintain confidence in its operation.

I'm of the same mind. I'll probably be doing the inner and outer pretty soon. Although at over $20 dollars for the assembly, I could see why people just do the wolf main outer.

I want to make sure I understand what you mean when you say "blunt nose." You are referring to the "old style" with fewer coils in the main spring, correct?