Silencing a bolt action : what are the options?

[Silverthorn]

Hello,

Disclaimer : yes I did a previous search for this topic but it's not easy to pinpoin something clear. If you know a specific thread that answers my request, please forward me the link. Thanks.

I own a low-end VSR-10 clone (HFC USR-11 to be precise) but it's pretty noisy compared to other snipers. I would like to learn more about what can be done/changed/upgraded/removed to make it more silent.

The bolt action mecanism itself make a lot of noise when I pull the trigger.

Any ideas or links I should read? Thanks!

[CDN_Stalker]

Put some expanding foam (used for sealing door/window jams) in the stock, it'll deaden the twang and make it feel a bit more solid.

[m102404]

I know that expanding foam needs contact with "air" to react...have you ever had any issues with spraying it into an enclosed area and having it pool and remain liquid/gooey?

Do you fill it all in one go or fill it in stages?

Thanks,

Tys

[tsuru]

As Stalker said use expanding foam but make sure you get the low expansion variety. Other things you can do:
- Get a Sorbo pad from airsoftparts.ca. There's a version intended for VSR's and their respective clones.
- Depending on the FPS of your rifle and your setup using the airbrake version of the original piston or using the PSS10 piston with the airbrake is a good way of lowering the noise signature of a VSR.
- Get a silencer adapter and use a silencer. Especially when the inner barrel is not threaded through the silencer it can make a big difference.

Always keep in mind that there is a large sound difference from the position of the firer and that of the person being fired at. My own VSR is quite loud up close but more than 100ft down-range you only hear the BB ripping through the air and not the rifle.

To m102404: Just spray the stuff in and go. You need to make sure that it gets into the small cavities to really fill the stock in but after you're done you just need to make sure it has long enough to cure. I've never had a problem where it remained liquid. The finished product is probably porous enough to allow air to seep through to the inside.

[Silverthorn]

Thanks everyone for those suggestions. great start! Keep em coming if you have more

Originally Posted by tsuru

.
- Depending on the FPS of your rifle and your setup using the airbrake version of the original piston or using the PSS10 piston with the airbrake is a good way of lowering the noise signature of a VSR.

Right now it's at 220-240 fps (yep it sucks). I am planning on a new spring to bring it up to 375 or so (don't want a high-powered beast). Right now it's stock. I was told that if I remove the airbrake I will increase sound but also increase fps. My main goal with the sniper is silence and fps between 350-400 without having to change each and every piece inside. I am looking for basic upgrades to see if I really like sniping.

tsuru : thanks for your tips about my earlier feeding problem. The sniper now works with marui mags. Big thanks for all your advices!

[m102404]

Cool, thanks. I only ask because I once attempted to make a foam filled fiberglass stock for a RS 6mmPPC and it was a gooey disaster. Looking back I should have poured the expanding foam in multiple layers...but once I started it, it was hard to stop. Even after a day the inner was still liquidy.

[CDN_Stalker]

Originally Posted by m102404

I know that expanding foam needs contact with "air" to react...have you ever had any issues with spraying it into an enclosed area and having it pool and remain liquid/gooey?

Do you fill it all in one go or fill it in stages?

Thanks,

Tys

I've used it inside the stock of my KJW M700 (no issues) and also in the suppressor part of my MP5SD, no issues at all with hardening fully. And I just went in one shot.

[Silverthorn]

Originally Posted by CDN_Stalker

no issues at all with hardening fully. And I just went in one shot.

oh man, the possibilities of jokes with this single quote... Talk about double sense!

and thanks for your advices

[CDN_Stalker]

Originally Posted by Silverthorn

oh man, the possibilities of jokes with this single quote... Talk about double sense!

and thanks for your advices

DOH!!! Good one, I missed that.