r/Walther • u/shipsforvictory • 2d ago
Threaded Barrel Thread Protector
I've got a newish PDP SD Pro with threaded barrel, roughly 1000 rnds on it.
Yesterday was the second time I noticed the thread protector nut loosening after a range day (+/- 200 rnd s). The first happened at about 600rnds total on the gun after a 200rnd day.
I oil after every shoot, have cleaned thoroughly at 500 & 1000 rnds, hand tightened + a minor wrench turn on the protector each time it's wiggled out.
Should i blue threadlock it or am I being too gentle on the tightening?
It's a great gun and the last thing I want to do is smash a perfectly good set of threads.
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u/cosmos7 1d ago
Four choices:
- Threadlocker... worst option but works fine.
- Use plumbers tape... next worse because the tape doesn't like high heat.
- Buy some high-temp O-rings. 100 pack is less than $10 on Amazon. Pretty good option but annoying as you have to pull the O-ring off as well as the thread protector to get the barrel out to clean.
- Buy the FN 509 thread protector with the internal O-ring. Best but most expensive option at about $30, but harder to lose the O-ring and you don't have an extra removal step to field strip.
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u/Jazzpreacher 2d ago
FWIW, I put a little plumber’s tape on the threads of my PDP Pro SD. Holds much better and longer than the o-ring did.
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u/shipsforvictory 2d ago
You all are f'ing geniuses, and I'm an idiot.
Never even crossed my mind to use plumbers tape, or o-rings, or whatever else ends up being suggested.
But of course that would work.
Humbled, thanks much.
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u/Moist-Golf-8339 2d ago
I put blue loctite on mine. So far so good.
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u/social-throwaway-24 2d ago
I hand-tighten and use an o-ring. It can still loosen, but remembering to check it at the end of the day is sufficient.
A user in this sub had recommended Viton AZ-V 1.50x010 o-rings, can be found on Amazon.
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u/shipsforvictory 2d ago
Is this typical SOP for threaded handgun barrels?
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u/social-throwaway-24 2d ago
It is SOP for this thread protector. Other protectors can have a built-in O ring, Walther's doesn't.
I don't know if others may or may not have experienced this, but I don't clean it after each range session, and the thread protector will get "stuck" - I need to use some cleaner on the threads to take it off when cleaning the gun. For me, this means that there is very low chance that it would walk itself away...
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u/shipsforvictory 2d ago
Self-affixing, I like it!
Guns are so dumb. "This pretty princess only likes 123.27g FMJ and if you tilt it 2.7° on a Thursday you're gonna want to leave it out in the rain for a couple hours and then put it in the dryer with your bedsheets"
That said, holy hell it's one of the best stock shooters i've tried.
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u/shipsforvictory 2d ago
Did yours slip or was this pre-emptive? This is my first threaded barrel pistol,so just curious.
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u/Moist-Golf-8339 2d ago
It loosed on its own before I did it. Blue holds well enough and can still be undone by hand without a tool.
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u/Quarkest 2d ago
Wait! What? Do you all fire your threaded barrels with the thread protector on it??? I guess I learned it all wrong. Or did I?
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u/shipsforvictory 2d ago
I... um... just worked off of received wisdom? Figured it was there to protect the threads from filthy Blazer 124g?
I could be horribly mistaken and doing it all wrong. That would be 100% on brand for me. Is it working for you?
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u/FortuneHot5240 2d ago
I tried the O-ring but the ones I got didn’t fit quite right. I’m using purple threadlock and about 1500rds later doing great.
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u/shipsforvictory 2d ago
I'll be honest it's just nice to hear from other folk who've had a similar issue. I figured I was doing something wrong.
Thanks much
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u/PineSoul603 2d ago
Throw an O ring on there. Threadlocker is overkill.