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AR Technical Discussion Dive into the details and specifications

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  #1  
Unread 04-18-11, 15:55
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Colt HBAR Elite, how to remove tube?

I have an HBAR Elite, the super heavy 24 inch varmint barrel. It has the metal round handguard. Strap wrench has been tried as well as heat. How does a brother get that removed? Any tips or secrets that are not obvious.

Gas block removed and gas tube removed, heavy elbow grease, no luck. ideas?

FYI, I have a 18inch WOA SPR barrel and DD12.0 coming to replace it.
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Unread 04-18-11, 19:39
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I am not completely familiar with the free float hand guard on your rifle. I do not remember them having a jamb nut. A receiver vise block and strap wrench is all I have ever used.

You have already tried heat so the only element left before drastic measures is freezing.

If it has a jamb nut then you could try freezing and two strap wrenches working the jamb nut and hand guard in opposite directions.
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Unread 04-18-11, 19:44
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I hope you find out on this thread because I've been scratching my head on the same thing. Everything else is fairly obvious, but not that forearm.
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Unread 04-18-11, 19:55
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Have you tried the old standbys; soak the threads for a few days/couple of weeks with a penetrating oil such as Kroil. Then clamp the upper in a fixture, and heat the handguard up with a torch. Not too hot, but enough to expand it a bit. Then slap on the strap wrench and go.

If all else fails, cutting the back end of the tube in a milling machine is and option. An expensive, have to be careful or you'll knarf the upper, option.

Last edited by patrick sweeney; 04-18-11 at 19:56
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  #5  
Unread 04-18-11, 20:10
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A strap wrench with a pipe over the handle for added leverage should do it.
If not get a longer pipe for more leverage...
If your gonna trash it 460's or a good old Rigid pipe wrench will do.
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  #6  
Unread 04-18-11, 20:25
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From what I can see there is no jam nut. This thing is on there tight. Unfortunately it is so damn long, it won't fit in my freezer.

Quote:
Originally Posted by az doug View Post
I am not completely familiar with the free float hand guard on your rifle. I do not remember them having a jamb nut. A receiver vise block and strap wrench is all I have ever used.

You have already tried heat so the only element left before drastic measures is freezing.

If it has a jamb nut then you could try freezing and two strap wrenches working the jamb nut and hand guard in opposite directions.
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  #7  
Unread 04-18-11, 20:56
az doug Offline
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I have never done it before, but you could try two strap wrenches going in the same direction, like a T handle. I do not know if that would give you added leverage, but might be worth a try. As others have written, try Kroil or some other form of penetrating oil.
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  #8  
Unread 04-19-11, 01:56
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Quote:
Originally Posted by Bsully View Post
A strap wrench with a pipe over the handle for added leverage should do it.
If not get a longer pipe for more leverage...
If your gonna trash it 460's or a good old Rigid pipe wrench will do.
This was my thought too. A pipe wrench, I have no doubt, would do it, but it will cause minor damage.
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Unread 04-19-11, 08:53
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I wonder if something like this would work.

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Unread 04-20-11, 23:58
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CR6724, uper disassembly

I know you will not like to hear this, but it is just threaded on, nothing else. The forearm is the barrel nut on this rifle, simple effective. I used a pair of strap wrenches on mine...

I am looking for a decent barrel for one of my two 6724's... what condition and what do you plan for the take off? Approximate round count?

Thanks
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  #11  
Unread 04-21-11, 09:34
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Mint condition, probably 200 rounds, max. Bought to Prairie dog hunt, that didn't happen. Shoots lights out. Was just going to keep for a rainy day. PM me if you want to make an offer.
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