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Technical Issue Critical To All Kmp9 Owners


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#1 SavageInsight

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Posted 05 March 2012 - 04:17 PM

Hey guys
   I found a critical feature of this gun that's responsible for a lot of people's "mystery issues."
   If you're like me, you have a strong love-hate for this pin-point accurate, LOUD beast.

   If you take the top "shell" off your gun, you'll notice a spring in the very rear of your gun. This spring is the nervous system for the entire KMP9.

   This is possibly the MOST sensitive part of your gun, and any change to the spring's tension causes your KMP9 to not fire.

   The spring is hooked into an anchor, and then to a 3 position slide "latch."  There's full rear, full forward, and then "mid-way."
    If the spring is too strong, it will actually pull the latch past the midway point, keeping your hammer cocked, but unable to fire.
    If the spring is too weak, the bolt will need to be recocked in order to fire - often per shot.

    The spring is secured by two hook ends into two tiny holes. Unfortunately if these hook ends stretch, you will have issues, and attempting to install a replacement yourself can damage the new spring.

    I love my KMP9. With the upgraded cocking-bolt spring I have in it, it's a surprise favorite.

    Unfortunately I need a new spring.

#2 Trevytrev

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Posted 05 March 2012 - 06:37 PM

pro- shop then?
http://kwausa.com/fi...S02V01_KMP9.jpg
im geussing the piece  is # 60, #162 or 165?
if the pro shop does not stock them then send them an email at
http://www.kwausa.com/support ( i think)
and 1.(626).581.1777
have a nice day!
Post Scritpus!- if I was waay off on what you are reffereing to then I am sorry, some of the information should still help.

Edited by Trevytrev, 05 March 2012 - 07:23 PM.


#3 gcw360

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Posted 05 March 2012 - 07:21 PM

 SavageInsight, on 05 March 2012 - 04:17 PM, said:

Hey guys
   I found a critical feature of this gun that's responsible for a lot of people's "mystery issues."
   If you're like me, you have a strong love-hate for this pin-point accurate, LOUD beast.

   If you take the top "shell" off your gun, you'll notice a spring in the very rear of your gun. This spring is the nervous system for the entire KMP9.

   This is possibly the MOST sensitive part of your gun, and any change to the spring's tension causes your KMP9 to not fire.

   The spring is hooked into an anchor, and then to a 3 position slide "latch."  There's full rear, full forward, and then "mid-way."
If the spring is too strong, it will actually pull the latch past the midway point, keeping your hammer cocked, but unable to fire.
If the spring is too weak, the bolt will need to be recocked in order to fire - often per shot.

The spring is secured by two hook ends into two tiny holes. Unfortunately if these hook ends stretch, you will have issues, and attempting to install a replacement yourself can damage the new spring.

I love my KMP9. With the upgraded cocking-bolt spring I have in it, it's a surprise favorite.

Unfortunately I need a new spring.
I would be very helpful if you listed the part you are describing.  Is it part #162?

#4 apacifico3

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Posted 06 March 2012 - 03:44 PM

Yeah, what part number is it? At first I thought you were describing the recoil spring (part #69) on the guide rod, then the trigger spring (# 73), and then I thought of the disconnector spring (# 162). Soooo... Which one is it? I recently put an order into the pro-shop for the disconnector spring but it's out of stock and I was told it wouldn't be in stock for another 3-4 weeks.

#5 SavageInsight

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Posted 07 March 2012 - 07:40 AM

I think, if I'm reading the parts list right, it's part # 162

#6 apacifico3

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Posted 07 March 2012 - 06:41 PM

Yup. That little spring is extremely important. If it's not at the right amount of tension, you've got yourself a nonfuctional gun. Just remember that if you stretch the spring too much, it's ruined (for the most part).

#7 marv22

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Posted 11 March 2012 - 04:10 PM

Its definitely part 162, take a small flat head and stretch it just a tad bit until the bolt and trigger system engage just right, then test the action, worked like a charm for me

Edited by marv22, 11 March 2012 - 04:13 PM.


#8 gcw360

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Posted 11 March 2012 - 04:23 PM

 marv22, on 11 March 2012 - 04:10 PM, said:

Its definitely part 162, take a small flat head and stretch it just a tad bit until the bolt and trigger system engage just right, then test the action, worked like a charm for me
Agreed, it's a simple fix.  Just don't over do it.

#9 SavageInsight

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Posted 12 March 2012 - 06:14 PM

Roger that, thanks guys!




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