Fix that hollow sound from a synthetic stock

danimal · July 06, 2005, 18:59

I have tried several methods to deal with this and I never liked the results... until NOW! I tried spray foam (great stuff)... dont waste your time or the "great stuff". I also tried foam rubber... no good. The latest effort was cheapier and easier (relatively). I stuffed my stock with plastic grocery bags!

First step is of course to remove the butt pad.
Now take the grocery bag by the bottom and twist it into a "rope".
Roll the "rope" into a ball and stuff it in the stock.
After about ten bags I would pack it with a dowel.
Keep packing until the stock is full and the bags are wanting to squeeze out just a little. Put the butt pad on and its done! Sounds like it is solid now!

I did this on a Tapco saw stock as well but first I reinforced the stock with a 1-1/2 schedule 40 pipe cut to fit horizontally then epoxied in place.

MG-70 · July 07, 2005, 00:48

Paper or plastic? I'm kidding, saw the "plastic" in the first paragraph.

Out of curiosity, why did the foam not work and how the hell did you get it out afterwards?

Cheers,
MG-70

danimal · July 07, 2005, 01:19

The foam did deaden the sound but did not remove it, I dug the foam out with the same dowel rod... WHAT A MESS! I dont think I ever got all of it out

I stuffed the stock with grocery bags in about 15 minutes and when you thump it with a finger its like thumping solid wood.

The stock was a ramline syntech for a small ring mauser... very hollow and VERY loud

ThunderGod · July 07, 2005, 13:24

I did the same thing to a .223 Saiga that I ended up trading for another AK-type rifle. Sombody's gonna go "huh" if they ever take off the pad and 3 dozen bags try to expand out.

On one FAL Century stock I epoxied some large washers and heavy card stock to the inner sides. Still sounds hollow, but more solid.

ggiilliiee · July 07, 2005, 14:16

vermiculite

dougjones31 · July 07, 2005, 14:28

How to fix that hollow sound from a synthetic stock......replace it with a wood stock!

3doghouse · July 07, 2005, 14:55

Quote:

vermiculite

That's a new one on me... and a new way to get in trouble at home... uh, no baby, I don't know what happend to your gardening bench...

Do you pack it in, or just pour it full?

ggiilliiee · July 07, 2005, 15:26

jus fill her up and make sure you have a good seal (butt plate) or youll get dusted slightly and if you are pissing off the lady already.... grab some hair spray spray down the vermiculite layed out on a table to keep the dust down inside the rifle ......get the biggest grained stuff you can find or sift thru a screen to get rid of the small particles

NoNotAgain · July 07, 2005, 19:11

I would stay away from using vermiculite for any application where it is going to be beat into small pieces creating a dust.

Vermiculite is now listed as a carcinogenic material.

Most shippers used to use vermiculite for packaging material to absorb spills, however after the classification as a carcinogenic just about everyone stopped.

The material inside of an AR stock is syntactic foam filled with microballons.

Two part polyurethane foam found in most boat repair stores also works quite well, just make sure to coat the recoil tube with either plastic wrap or PVA as a release agent.

jwaters · July 07, 2005, 21:31

Concrete should do the trick.

Or Lead Shot?

Enough joking,

Actually, I suppose you need a sound dampening material. A hard material like concrete would carry the sound thru.

Seriously,

I like the wood suggestion the best.

But then again, I don't mind the sound. Guess I shot too many AR's.

JW

July 06, 2005, 18:59	#1
danimal Registered FALaholic #: 9560 Join Date: Feb 2003 Posts: 420	Fix that hollow sound from a synthetic stock I have tried several methods to deal with this and I never liked the results... until NOW! I tried spray foam (great stuff)... dont waste your time or the "great stuff". I also tried foam rubber... no good. The latest effort was cheapier and easier (relatively). I stuffed my stock with plastic grocery bags! First step is of course to remove the butt pad. Now take the grocery bag by the bottom and twist it into a "rope". Roll the "rope" into a ball and stuff it in the stock. After about ten bags I would pack it with a dowel. Keep packing until the stock is full and the bags are wanting to squeeze out just a little. Put the butt pad on and its done! Sounds like it is solid now! I did this on a Tapco saw stock as well but first I reinforced the stock with a 1-1/2 schedule 40 pipe cut to fit horizontally then epoxied in place.

July 07, 2005, 00:48	#2
MG-70 Registered FALaholic #: 753 Join Date: Aug 2000 Location: Mid-Atlantic U.S. Posts: 905	Paper or plastic? I'm kidding, saw the "plastic" in the first paragraph. Out of curiosity, why did the foam not work and how the hell did you get it out afterwards? Cheers, MG-70 __________________ "Laws that forbid the carrying of arms . . . disarm only those who are neither inclined nor determined to commit crimes . . . Such laws make things worse for the assaulted and better for the assailants; they serve rather to encourage than to prevent homicides, for an unarmed man may be attacked with greater confidence than an armed man.” Quote from Commonplace Book by Thomas Jefferson [borrowed from Cesare Beccaria’s 1764 Dei delitti e delle pene, "On Crimes and Punishments"]

July 07, 2005, 19:11	#9
NoNotAgain Registered FALaholic #: 6893 Join Date: Jul 2002 Location: Peoples Republic of Maryland Posts: 1,341	I would stay away from using vermiculite for any application where it is going to be beat into small pieces creating a dust. Vermiculite is now listed as a carcinogenic material. Most shippers used to use vermiculite for packaging material to absorb spills, however after the classification as a carcinogenic just about everyone stopped. The material inside of an AR stock is syntactic foam filled with microballons. Two part polyurethane foam found in most boat repair stores also works quite well, just make sure to coat the recoil tube with either plastic wrap or PVA as a release agent. __________________ Without the Second Amendment to the Constitution, there is no first.

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July 07, 2005, 01:19	#3
danimal Registered FALaholic #: 9560 Join Date: Feb 2003 Posts: 420	The foam did deaden the sound but did not remove it, I dug the foam out with the same dowel rod... WHAT A MESS! I dont think I ever got all of it out I stuffed the stock with grocery bags in about 15 minutes and when you thump it with a finger its like thumping solid wood. The stock was a ramline syntech for a small ring mauser... very hollow and VERY loud

July 07, 2005, 13:24	#4
ThunderGod Banned TROLL FALaholic #: 7196 Join Date: Aug 2002 Location: North Texas Posts: 4,819	I did the same thing to a .223 Saiga that I ended up trading for another AK-type rifle. Sombody's gonna go "huh" if they ever take off the pad and 3 dozen bags try to expand out. On one FAL Century stock I epoxied some large washers and heavy card stock to the inner sides. Still sounds hollow, but more solid.

July 07, 2005, 14:16	#5
ggiilliiee banned again FALaholic #: 17179 Join Date: Mar 2005 Location: orygun Posts: 4,838	vermiculite

July 07, 2005, 14:28	#6
dougjones31 Registered FALaholic #: 6967 Join Date: Jul 2002 Location: South Carolina Posts: 4,282	How to fix that hollow sound from a synthetic stock......replace it with a wood stock!

July 07, 2005, 15:26	#8
ggiilliiee banned again FALaholic #: 17179 Join Date: Mar 2005 Location: orygun Posts: 4,838	jus fill her up and make sure you have a good seal (butt plate) or youll get dusted slightly and if you are pissing off the lady already.... grab some hair spray spray down the vermiculite layed out on a table to keep the dust down inside the rifle ......get the biggest grained stuff you can find or sift thru a screen to get rid of the small particles

July 07, 2005, 21:31	#10
jwaters Registered FALaholic #: 5220 Join Date: Jan 2002 Posts: 852	Concrete should do the trick. Or Lead Shot? Enough joking, Actually, I suppose you need a sound dampening material. A hard material like concrete would carry the sound thru. Seriously, I like the wood suggestion the best. But then again, I don't mind the sound. Guess I shot too many AR's. JW