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AR15.COM
5/9/2026 8:20:44 PM EDT
New walther p99 AS final edition
Jarvis threaded barrel
Earl walther red recoil spring
Cgs mod9

Slide wont fully return to battery when shooting suppressed about half the time.
Tried a variety of ammo from 115gr to 147gr

No problems without the suppressor.
5/10/2026 7:38:12 AM EDT
[#1]
When I bought a factory Walthers PPQ M2 threaded barrel kit (it works in the P99 as well) it came with a heavier recoil spring. I didn’t need it in mine to run, but I’m wondering if yours has seen some mileage, it may not be enough to fully lock it back up with the extra suppressor weight. Might want to try a new or heavier recoil spring.
5/10/2026 12:34:36 PM EDT
[Last Edit: FloridaMan11b][Edited] [#2]
Quote History
Originally Posted By chemcmndr:
When I bought a factory Walthers PPQ M2 threaded barrel kit (it works in the P99 as well) it came with a heavier recoil spring. I didn’t need it in mine to run, but I’m wondering if yours has seen some mileage, it may not be enough to fully lock it back up with the extra suppressor weight. Might want to try a new or heavier recoil spring.
View Quote

Everything is new. Hardly any mileage. The red recoil spring i got from Earl Walther is supposed to be for suppressor use.
Looks like i will have to try another recoil spring solution from DPM or Sprinco.
6/9/2026 9:57:39 PM EDT
[#3]
@FloridaMan11b

I’m using a factory Walther spring that they include with their threaded barrel. It’s worked great so far.
7/1/2026 4:28:48 PM EDT
[Last Edit: KissMethod17][Edited] [#4]
When I had a P99AS and got the same threaded  Walther barrel that comes with the spring as the other posters above, I too did not have issues shooting suppressed. Worked great. I believe the spring was green IIRC.
7/4/2026 12:36:54 PM EDT
[Last Edit: dmk0210][Edited] [#5]
Quote History
Originally Posted By KissMethod17:
When I had a P99AS and got the same threaded  Walther barrel that comes with the spring as the other posters above, I too did not have issues shooting suppressed. Worked great. I believe the spring was green IIRC.
View Quote
The recoil spring included with the Walther threaded barrel is green.

FYI, both the barrel and the green spring in the threaded barrel kit for my P99 are exactly the same as those in my PDP Pro SD.


9/14/2026 5:09:50 AM EDT
[#6]
Tried the sprinco red spring too. Same issue.

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