Ruger PC9 "TWAaanggg"

C

Cityevader

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Oct 27, 2022
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Reverberating right up into the cheeck bone is this undesireable twang. It makes a fine rifle with an otherwise stout and confidence-inspiring feel, into a plastic toy with a hollow handle.
Ii just ordered some adhesive neoprene for a cheek riser 10 minutes ago, so that might resolve the issue; I have a feeling it will only somewhat mitigate it.

Has anybody gone through this?
I see a used stock on ebay that I might consider experimenting with, filling with expanding foam and lead shot, or some other even sillier idea....
 
There have been no issues whatsoever otherwise. To hazard a guess, approximately 1500rds have gone through it over a year and a half. It is a very consistent rifle, and regularly hits a 10" circle at 100 yards with open sights. It is only limited by the shooter. :)
I actually hand-filed the front sight, with enormous care, and glued onto it the smallest glo-optic rod I could find. That small bead is leaps and bounds better than the only available sight option; the Tandemkross sight has a giant glo-rod that is equivalent to a 4ft diameter circle at 100yds. My new sight is about an 8inch circle within that 10inch target. :)
I am very happy with this rifle so far.
 
I have a PC9 and a PC Charger with a folding stock. They are blowback action carbines. Every blowback carbine I have shot has a similar twang when the bolt hits the back of the receiver. To get away from the twang you need a retarded action like a HK MP5 (at 4 times the price). I just got used to it and came to terms with... that is just what it is.
 
Yup. I agree with MikeInOr; I think you’re just feeling the buffer. I also did the M*Carbo thing and got the adhesive cheek riser; but also got their ‘better’ buffer replacement. Have you tried that? I noted no diff on aim/distance/etc… but it DID help a bit with the ‘thunk’ at the end of bolt travel (it’s a little thickers and has a rubber pad on the buffer).

I absolutely love my PC9; though I use a red dot to compensate fer my eyes…
 
I could hear the block and spring action in mine. It wasn’t bad, but it diminished with the addition of some MCARBO parts. The buffer pad and the cheek pad helped. I also replaced the pins in mine and I replaced the spring cups with metal ones from MCARBO as well.
 
No twang in mine.
Just the shuck shuck sound of the bolt going back and forth.

I like your front sight solution. I’m really struggling with my open sights. Put a Romeo5 in a low mount on it, big help.

But I’m switching to a low riser mount so I can see my open sights under my red dot for back up sighting and I need a front sight solution.
 
Never noticed a twang while shooting my PC9. The first time that I heard a twang while shooting was my first time with the M16. I thought "that's different", but then ignored it ever since, even with my ARs.
 
If the recoil buffer pad doesn't resolve it, then "it is what it is, and it ain't what it ain't."
 
My experience has shown the Ruger PC's are not at all tough, I rippled the bore on mine when testing ammo.
 
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I'm a noobie...what does "rippled the bore" mean?
I've no idea how tough it is. I've formed an opinion based solely from a tactile perspective.
 
Cityevader said:
I'm a noobie...what does "rippled the bore" mean?
I've no idea how tough it is. I've formed an opinion based solely from a tactile perspective.
Click to expand...
It's something that I did to the bore of my Ruger PC carbine by shooting hot loads in it. There were obvious rings in the rifling from the muzzle end extending 6 " down the bore. After this occurred the accuracy was non existent. I got rid of the Ruger asap and bought a TNW aero survival rifle, I shot the same loads in the TNW with no ill effect.
 
After pulling it apart to upgradethe buffer pad, i "think" the cause is the clearances for the tungsten weight, as it jiggles a bit.
Has anybody experimented with a plastic shim in there?
I hesitate to do so, in fear of it coming apart and jamming the bolt.
 
Cityevader said:
After pulling it apart to upgradethe buffer pad, i "think" the cause is the clearances for the tungsten weight, as it jiggles a bit.
Click to expand...
The deadblow weight is intended to move back and forth, but not side to side. It's necessary because of Ruger's short receiver and non-telescoping bolt. If you jam it inside the bolt's body, you're risking to get misfires. Fortunately to you, Ruger PC is somewhat OOB safe, so instead of blowing up it's going to refuse to fire.

If you want to experiment with the stock, buy a Magpul Backpacker stock. It has a cavity where the cheek is. You can fill that one with foam as much as you want, or manufacture a cheek riser that fits into it.
 
Twang just doesn't sound right. My cz457 when it was in the synthetic stock and I ran a suppressor is twangy. Much better now that I swapped it into a laminate stock.
 
The tungsten block has only a few thousands of play in any direction, so "moving fore/aft" doesn't seem to happen?
 
Sistema1927 said:
Never noticed a twang while shooting my PC9. The first time that I heard a twang while shooting was my first time with the M16. I thought "that's different", but then ignored it ever since, even with my ARs.
Click to expand...
Remember that 'sproing' noise, from my M16 in basic; lots of lube in the buffer tube made it sproing even more.
Haven't noticed it on my current AR, but that might just be my hearing....
Have an original PC9, and no twang on that, either.
Moon
 
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