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Have you considered the route I took? A road far less traveled. You could use my concept but tweak it
Great idea! I was thinking along those same lines myself since I just received the ARP 16" scout barrel for my first 6.8 build. I just bought a 13.5" Jag Composites Carbon Fiber HG for a light weight WWSD (What Would Stoner Do) 5.56 build I'm working on, so I thought, it'd be great to have this 4.1 oz (total w/nut and hardware) HG on the 6.8 build too. It's 1.7 oz lighter than the JL Billet NANO Ultra Mag / Alu 13" HG at 5.8oz for basically the same $$$, and carbon fiber is supposed to be stronger and more heat insulated than aluminum.

I think I just talked myself into buying another one now ?
 

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Seems to be made of 3 layers. Outside carbon fiber, inside some white foam type thing, and inside maybe polymer? Any idea what the other 2 layers are and why it's not 1 piece carbon fiber?
I don't know. I didn't notice that. I had a good email conversation with the owner, prior to ordering mine. I just emailed him your question. I'll let you know what he says.
 

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I don't know. I didn't notice that. I had a good email conversation with the owner, prior to ordering mine. I just emailed him your question. I'll let you know what he says.
His reply:
Sorry for taking so long to get to your email.

I guess someone was eventually going to ask the right question...haha. So what they're seeing is basically the patent pending construction of the handguard, and the reason why it's lighter than anything else out right now. It's commonly referred to as sandwich panel construction. I'm an aerospace engineer with composites experience so I've seen it a good bit.

These guys did a pretty good brief description of what it is:
Buy Composite Sandwich Panels | Rock West Composites

This is a little more in depth explanation and really well written:
Why You Should Be Using Sandwich Panels aircraft interiors and Formula 1 cars are so stiff and light

They only say aircraft interiors in the second article but it's also used on structural parts that will take bird strikes.

Anyone who's worked in composites will probably appreciate the difficulty and expense in making a tubular shaped sandwich laminate. The fact that it's used on formula one cars should say a lot. They're definitely on the cutting edge of composites technology.

I hope that answers your question.
 

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My coda handguard has thinner walls (significantly thinner) and seems stronger than the JAG, even though it's only 0.4oz heavier (both are 13.5"). Would like to see a torture test of it, comparison with other CF handguard etc.
Oh, I see that the Jag is 2.8oz lighter, since it's is 4.1oz and the Coda is 6.9. Or are you comparing just the carbon tubes without barrel nuts and hardware?
Would like to see a torture test of it, comparison with other CF handguard etc.
Yeah, that would tell the tale. I'd like to see that. 3 of the top CF HGs will be $1000 though. Who can we encourage to get all of those just to destroy them? MrGunsnGear perhaps?
 

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I almost went carbon fiber, but decided not to for one reason. Abrasion. Once you loose the protective coating, it's ...
That's good insight. I hadn't thought of that. I might have to keep a bottle of clear fingernail polish around to seal up scratches. You should try out a CF handguard and see if it does hold up for you though. I'd be interested to know.
I haven't heard of any CF parts breaking down like that, but they are fairly new and not in use by the military, so I'd guess the folks using them are like me and not using them very hard.
 
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