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Old 08-19-2019, 07:05 PM   #1
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Experiment With Tungsten Guide Rod

Wanting to add more weight to the barrel of my P 99. I ordered the tungsten guide rod that Walther advertises for its PPQ 4" and 5" models. I put it in my P 99 and it seems to fit perfectly. I then called Walther and asked a lady there if the guide rod would work in the P 99. She said no and I told her I had already put one in my P 99. She said let me ask one of the gun smiths. The answer came back that if the slide would function back and forth with the guide rod it would probably work. I said there was no problem with that. In fact, there is little discernible difference in functioning the slide with either the original guide rod or the tungsten one. So i am going to shoot the P 99 with the tungsten guide rod and see what happens. The lady at Walther said let us know what happens.
Anyone else tried this combo in their P 99? Any reasons, why I should not try this? If you don't here more from me - well.......LOL
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Old 08-19-2019, 07:33 PM   #2
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Pay attention to where the guide rod seats against the frame (when the pistol is assembled). My only concern would be if there was any abnormal wear in this area due to using a guide rod that is heavier than the original design. This has been an issue on other designs in the past.

Other than that, I wouldn't see an issue using one of these.
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Old 08-19-2019, 07:34 PM   #3
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Errrrrr, looking at the 'exploded view' the part numbers for the rsa are the same (2625164) for the PPQ and the P99. I'm thinkin' you're in like Flint.
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Old 08-19-2019, 07:42 PM   #4
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The design around where the guide rod is seated in the frame is a little different between the P99 and PPQ. I doubt there is much difference, but if I heard from the manufacturer that they don't recommend this, I'd at least keep an eye on it.

It is not unheard of. Colt Mustang owners learned this the hard way.
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Old 08-19-2019, 08:23 PM   #5
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So how much heavier is the tungsten guide rod going to make the gun? Can’t be enough to make a substantial difference in performance. Tungsten is a light metal. Why not stainless steel? Not that SS would make the gun any better either. Good luck with your experiment. It is not one I would consider.
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Old 08-19-2019, 09:42 PM   #6
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You should still be able to acquire the military metal guide rod assembly for the P99 from Earls. It isn't cheap but it does accomplish what you seek to do without that element of worry.
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Old 08-19-2019, 11:50 PM   #7
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Originally Posted by balance View Post
It is not unheard of. Colt Mustang owners learned this the hard way.

What was the situation on the Mustang? Just curious, as I have a Mustang Lite and an old Mustang Plus II.
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Old 08-20-2019, 07:49 AM   #8
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Originally Posted by 1942bull View Post
Tungsten is a light metal. Why not stainless steel? Not that SS would make the gun any better either. Good luck with your experiment. It is not one I would consider.
Tungsten is about 2 1/2 times heavier.
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Old 08-20-2019, 08:30 AM   #9
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Tungsten is about 2 1/2 times heavier.

Indeed, my addled 77 year old brain confused it with Titanium. Now the OP's plan make sense to me. Thanks for defogging me.
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Old 08-20-2019, 08:33 AM   #10
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Indeed, my addled 77 year old brain confused it with Titanium. Now the OP's plan make sense to me. Thanks for defogging me.
Just a FYI....the tungsten rod weighs 63gm and the "plastic" rod is 14gm.

https://www.carl-walther.com/product...s/2820790.html
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