How to get rid of the Hatsan ping noise from hammer spring?

[Makoda]

I recently purchased a flashpup and it was making a pinging noise. I assumed it would be fixed with a depinger. After adding one I was able to realize the sound is coming from the hammer and spring area. By just lifting and lowering the bolt handle you can replicate it so I am guessing it is the hammer spring.

Just thought I would ask if anybody had some sort of a fix for this. Otherwise I will tear into the next time I get some time to fiddle with it.

 

[starlingassn]

I think what you're hearing is just going to be the nature of the Beast

 

[ackuric]

Its the SPRUNG striker hitting the standing valve stem...metal to metal. Here is what I do to resolve it...

That is a PEEK tip installed into the striker where contact with the valve stem is made. This will change the metallic TING into a duller TING.

My striker currently has compressed leather installed in the same fashion, and is nearly completely silent. The leather may take more of a beating with valves that are highly sprung or with heavy hammers. My configuration is 7.7 lbs of spring max and a 48 gr hammer which isn't too harsh on the leather. 1000's of rounds and it hasn't changed shaped or needed replacement. The key is to pre-compress the leather, let the hammer beat it into the valve some more, then tune!

 

[BigTinBoat]

Its the SPRUNG striker hitting the standing valve stem...metal to metal. Here is what I do to resolve it...

Since he says he can duplicate it by just raising and lowering the cocking bolt I think its the spring itself, not the striking.

I've heard some guys having luck using shrink tubing on the spring. I think a lot of it is the nature of the beast of a bullpup with the your ear laying right on the action.

 

[ackuric]

Springs don't ping themselves when simply compressed? Springs can have TWANG when under compression and that compression is then released. Which is definitely a spring twang and not a ping or ding noise. JMO!

 

[Motorhead]

 

Put into the springs ID a short piece of soft tubing or perhaps a piece of foam ear plug ... NO MORE TWANG

 

[BigTinBoat]

Springs don't ping themselves when simply compressed? Springs can have TWANG when under compression and that compression is then released. Which is definitely a spring twang and not a ping or ding noise. JMO!

I agree and think he was just misnaming the sound.

 

[Makoda]

Yeah you guys are right. I know the sound of hammer smacking the valve and being as this is my first Bullpup it is definitely louder than I am used to with rifles but I expected that. The sound is a spring like you guys are saying but it is making a very high pitched twang, and it continues on for a couple seconds after the shot is over, almost sounds like the doctor hitting one of the metal triangles by your ear to check your hearing.

probably will try the tubing inside the spring of an ear plug, but maybe me and Bullpups are just not meant to be. Maybe trade it off for a marauder pistol or something without the action under my ear.

 

[ackuric]

Yea...unfortunately that is the downside to bullpups. That is why I love my rifle, Custom marauder sub 5 lbs undressed, its 34-39" long depending on how I set it, and I don't have a cocking lever by or behind my ear, nor is the action/hammer, plus I have my action modified to be very quiet with the compressed leather making contact with valve stem. I wouldn't shoot a pcp any other way.