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Old 11-25-2006, 09:44 AM   #1 (permalink)
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heat shield in a FAL custom handguard

I am making a full floating handguard for my Fal out of 2in ID carbon fiber tube and some 1.5-2in thick aluminum "bulkheads" at either end. Now I know the carbon fiber can handle some heat but was thinking of putting a shielding material on the inside to just be safe and to keep the handguards cool.

Aluminum foil epoxied on?

I dont want to add a shitload of weight. I can put just about anything can be layed in there as the top is "split" as the gas tube sticks above it
like this but not with all the oval holes

and if I do add holes they will be round and aluminum grommited to prevent splitting and to look cool
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Old 11-25-2006, 10:15 AM   #2 (permalink)
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So what do you want to know? Use heavy duty aluminum foil?

Just do it.
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Old 11-25-2006, 10:21 AM   #3 (permalink)
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stupid non-gun knowledgable question


Wouldn't aluminum grommets just transfer heat? For that matter wouldn't foil just transfer heat rather than shield?

Dunno..just wondering
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Old 11-25-2006, 10:24 AM   #4 (permalink)
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Quote:
Originally Posted by basketcasejeep


So what do you want to know? Use heavy duty aluminum foil?

Just do it.
If there is something better than aluminum foil
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Old 11-25-2006, 10:26 AM   #5 (permalink)
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Quote:
Originally Posted by Joe_W
stupid non-gun knowledgable question


Wouldn't aluminum grommets just transfer heat? For that matter wouldn't foil just transfer heat rather than shield?

Dunno..just wondering
it would reflect it unless it is in contact then it would radiate it.
The heat shields under your car are just aluminum spaced away from the cat/exhaust
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Old 11-25-2006, 10:30 AM   #6 (permalink)
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Aluminum would definitely be the way to go.




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Old 11-25-2006, 10:31 AM   #7 (permalink)
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Quote:
Originally Posted by usmcdoc14
it would reflect it unless it is in contact then it would radiate it.
The heat shields under your car are just aluminum spaced away from the cat/exhaust
Yea I got to thinking about just that after I posted...oh well
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Old 11-25-2006, 10:34 AM   #8 (permalink)
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Quote:
Originally Posted by animator
Aluminum would definitely be the way to go.
don't mock my ghetto/rednck gunsmithing
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Old 11-25-2006, 10:48 AM   #9 (permalink)
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Gil, heat shields work cause they're spaced away. If you can pull that off, it'll block the heat, if it's touching at all it'll transfer heat very efficiently
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Last edited by mike; 11-25-2006 at 10:48 AM.
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Old 11-25-2006, 10:51 AM   #10 (permalink)
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Quote:
Originally Posted by mike
Gil, heat shields work cause they're spaced away. If you can pull that off, it'll block the heat, if it's touching at all it'll transfer heat very efficiently
ya I know but its is proving hard to find that layered/spot welded/aluminum shit they make head sheilding out of.
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Old 11-25-2006, 10:56 AM   #11 (permalink)
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yea, you'd have to get AL sheet and form it then spot weld it
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Old 11-25-2006, 11:00 AM   #12 (permalink)
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Quote:
Originally Posted by mike
yea, you'd have to get AL sheet and form it then spot weld it



and I was looking in the wrong place. I think flexible automotive sheet stuff would work better
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Old 11-25-2006, 11:04 AM   #13 (permalink)
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how 'bout using some .049 6061 tube with stand offs for the heat shield?
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Old 11-25-2006, 11:08 AM   #14 (permalink)
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Quote:
Originally Posted by 300sniper
how 'bout using some .049 6061 tube with stand offs for the heat shield?
you mean the .049 6061 tube AS the heat sheild right?
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Old 11-25-2006, 11:08 AM   #15 (permalink)
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Quote:
Originally Posted by usmcdoc14
If there is something better than aluminum foil
There is. Heavy duty aluminum foil.



I think I've also seen some thin aluminum in rolls for roof flashing. I suppose that would work if it is not too thick and heavy.
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Old 11-25-2006, 11:11 AM   #16 (permalink)
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Quote:
Originally Posted by usmcdoc14
you mean the .049 6061 tube AS the heat sheild right?

yes, with maybe .125-.250 spacers between the carbon fibre tube.
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Old 11-25-2006, 11:11 AM   #17 (permalink)
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Quote:
Originally Posted by basketcasejeep
There is. Heavy duty aluminum foil.



I think I've also seen some thin aluminum in rolls for roof flashing. I suppose that would work if it is not too thick and heavy.
that would work with some epoxy in strips to "stand it off" AND adhere it or maybe some high temp RTV.

hmmm what would be better?
see now we are working in the realm of cheap
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Old 11-25-2006, 12:03 PM   #18 (permalink)
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Doc, check this out, it should fit the bill.
http://www.denniskirk.com/jsp/search...eafCatId=31201
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Old 11-27-2006, 11:08 AM   #19 (permalink)
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Quote:
Originally Posted by usmcdoc14
that would work with some epoxy in strips to "stand it off" AND adhere it or maybe some high temp RTV.

hmmm what would be better?
see now we are working in the realm of cheap
Hmm... JB weld.

JB, JB quick, or putty?
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