New recoil spring for cm9

[bonjorno2]

Got my replacement spring from kahr today and its a coil longer than the one that came with the gun originally.... I wonder... I couldn't even lock the slide to the rear when I reassembled the pistol with the 15 coil spring, so I put the 14 coil spring in the gun and called it a day.

[jocko]

well that is strange. as kahrs cm or pm recoil springs are either 13 or 15 coils, not 14 . I did count the shorter one in your photo and 14 it is. , did u shorten it or did it come that way. I have no doubt u could trim back that longer coil a quarter cliupo at a timne until the slide locks openb ok and you would be good to go. The 15 coil spring should be the right one and in tie it would take a pre=set like the one above to.
what does surprise me is tha tyou were able to get JUST THE OUTTER SPRING, as kahr only shows the complete assembly which IO is a rip off as all thaqt is needed is the outter spring. I had written to kahr aobut this a few months ago and suggested they offer obnly the outter springs (which they used to do) and I waqs told that the suggestion was valid and that they would see what cold be done. Trim off a quarter of the open coil and u willbe fine, although they should send the right springs that works without any mods being done to IMO. More than likely ur 14 coil spring could be an inhouse change to. hell who knows..

I do think for some reason on the newer kahrs that when is havinbg some break in issues, such as slide not lockinbg back it is all recoil spring related to in that it might just take some rounds down range to get that spring set right. Hand cycling willnot do a pre-set near likje shootinbg the gun as u well know.

[hoghunter]

Interesting. Keep in mind Kahr actually cut my CM9 recoil spring SHORTER in an attempt to solve the nosedive issues. I have yet to take it to the range to test but will on Sunday weather permitting and provide a report.

[jocko]

yup they sure did...

[bonjorno2]

jocko, they sent me the entire recoil assembly, i just left it out of the pic because i thought it would take away from the outter spring.. I bought my cm9 from buds and the only mod i made to it was the front night sight and that's it. Maybe I got a bad spring with the first assembly and that help contribute to the little nut/bolt coming off the innerspring upon shooting it. I will try to trim it down a tad until i can get it to lock open since they are supposed to have 15 coils or whatever they are called... If you recall my break in thread I mentioned that I had issues every so often with the slide NOT locking open when empty... makes me wonder

[bonjorno2]

hoghunter, sorry to hear about the nonsense with yours... i had issues with my first p380 and ended selling it after sending it back to them a few times.

[jocko]

humm

jocko, they sent me the entire recoil assembly, i just left it out of the pic because i thought it would take away from the outter spring.. I bought my cm9 from buds and the only mod i made to it was the front night sight and that's it. Maybe I got a bad spring with the first assembly and that help contribute to the little nut/bolt coming off the innerspring upon shooting it. I will try to trim it down a tad until i can get it to lock open since they are supposed to have 15 coils or whatever they are called... If you recall my break in thread I mentioned that I had issues every so often with the slide locking open when empty... makes me wonder

SLIDE LOCKING OPEN WHEN EMPTY??? ain't they supposed to do that??

More than likely that little nut on the end was not locktited on asit should be. No doubt trimming down that coil will bring it back to working condition. I would also think if u could get that sucker in the slide OK that 50 rounds down range and it would cycle and lock back OK also, but being your original spring has 14 coils, maybe kahr has done a slight change. Hell who knows..

[bonjorno2]

yeah, i fixed it i meant to say not locking back.... lots on my mind tonight sorry

[JBarbaresi]

this is why i was wondering how many coils were on the spring in hoghunter's gun when he got it back. i wonder he originally had a spring with too many coils and they shortened it to be the correct length, or if his gun just needs a recoil spring slightly shorter for some reason.

if there is variation in the recoil springs coming from kahr it would be interesting to see a correlation between the number of coils on the guns experiencing malfunctions and failures vs. the ones running fine.

mine has 14 like the top on in your picture, i am at 900 rounds without a single problem...

[bonjorno2]

yeah, i had 0 ftf, fte, stove pipes ect... just the slide not locking back like it should... Maybe it was the spring or me idk time and rounds down range will tell, but i have my carry gun back now so I am glad for that.... Maybe i'll email Jay and ask him if he knows.

[hoghunter]

this is why i was wondering how many coils were on the spring in hoghunter's gun when he got it back. i wonder he originally had a spring with too many coils and they shortened it to be the correct length, or if his gun just needs a recoil spring slightly shorter for some reason.

if there is variation in the recoil springs coming from kahr it would be interesting to see a correlation between the number of coils on the guns experiencing malfunctions and failures vs. the ones running fine.

mine has 14 like the top on in your picture, i am at 900 rounds without a single problem...

JB,
I just took the recoil spring out. I now have 12 coils and one right up against the spring stop so that may count as 13 (depending on how you count it I guess). This CM9 will be on the range at 9am Saturday (unless rain) so I will be sure to post a report.

[JBarbaresi]

JB,
I just took the recoil spring out. I now have 12 coils and one right up against the spring stop so that may count as 13 (depending on how you count it I guess). This CM9 will be on the range at 9am Saturday (unless rain) so I will be sure to post a report.

going by the picture posted by the OP, the top spring having 14 coils and the bottom having 15, can you figure out if you have 13 or 12? you may have like 12.5 or 13.5 if they snipped off half a coil or something like that. either way i guess its hard to tell what they did if we don't know how many coils you had prior, especially when it appears there are more than one version available. i hope your gun works if you get to shoot it tomorrow.

[bonjorno2]

yeah i wonder what is up with the springs coils being different, but I am sticking with my 14 coil spring for now.

[Michael W.]

yeah i wonder what is up with the springs coils being different, but I am sticking with my 14 coil spring for now.

I had the same thing happen when I first got my PM45.

The little retention nut on the end of the RSA work itself loose
and shot off.

Kahr sent me a new assembly but the spring was a couple of coils
longer for some reason. I mean I could not install it in
the gun.

I called Kahr and they said it was likely that the spring was sized for
a P45 or TP45. I'm guessing its likely that they buy the springs all the
same size for a given caliber and cut them down in final assembly
of the gun.

At any rate, like you I just put my old spring on the new RSA and walla,
I was up and running. Nothing to lose any sleep over.

M-

[Steeltoes]

Interesting. Keep in mind Kahr actually cut my CM9 recoil spring SHORTER in an attempt to solve the nosedive issues. I have yet to take it to the range to test but will on Sunday weather permitting and provide a report.

How did that work for you, did you get to the range?