14" barrel conversions - Graybeard Outdoors
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post #1 of 23 (permalink) Old 05-20-2019, 07:05 PM Thread Starter
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Default 14" barrel conversions

I am interested in experiences and/or photos of 14" barrels that have been extended with a tube, brake, or comp for use on a rifle frame. Did it effect accuracy?

I am considering getting a linear comp or bloop tube tube for my 14" 7TCU barrel so I can use it in either configuration. How is the pinning done? Perpendicular to the bore like a rimfire barrel attached to a receiver? or can it be straight through the extension and into the original barrel or threads just deep enough to keep it from spinning (like a permanent screw)? I had been thinking about just reducing the diameter 0.5" back from the muzzle, slipping a proper diameter tube on it, drilling about 0.05" into the remaining barrel diameter, then tack welding over the pin. Thoughts?

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post #2 of 23 (permalink) Old 05-21-2019, 10:47 AM
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I am not an expert at this stuff, but I do know that the tube or extension must be pinned or welded into place that it requires a major effort to remove it.

In my personal experience I prefer a little longer barrel then just the 16 inches required. At least an eighteen or twenty inch barrel makes the gun way more handy to me. I really don't like short barrel (legal) length rifles.

At one time I had thought about having a tube put on a 14" barrel and having it pinned with a tapered pin so that it could be removed if desired, but decided against it.

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post #3 of 23 (permalink) Old 05-21-2019, 02:13 PM
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They work great, albeit loud if you use a break that close to ya'.
David White is the guy to do it.
https://dandtcustomgunworks.websitet...pid=1285971895
Excellent accuracy ALL!
note: The Herrett I did myself
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post #4 of 23 (permalink) Old 05-21-2019, 08:22 PM
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I once had a super 14 that was a rechamber to 444 marlin I had an extension made of aluminum that was 4 inches long turned inside to about 2 thousands smaller than the barrel outside dim. and the hole for the bullet was about a 1/16 larger than the 444 I put the barrel in the freezer over night and the next day I pressed it on to the barrel about an inch it was solid as a rock. spray painted it flat black ugly as sin but it worked good for a short rifle barrel.

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post #5 of 23 (permalink) Old 05-21-2019, 10:52 PM Thread Starter
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Deacon, how thick was the aluminum, and how well did it hold up? I am mildly concerned about the different metals interacting, and if this is permanent enough to satisfy a deliberate inspection.

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post #6 of 23 (permalink) Old 05-22-2019, 10:03 AM
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The thickness of the tube was about 1/4 inch my adult grand son is a machinist and he made it for me I really don't think it would pass under ATF rules but I used it on my home place and did not worry about it. I sold it to Ed contenders several years ago. I would think having the barrel threaded and then epoxy it in place might work But if I were you and with that cal. I would sell it and if I wanted that Cal have MGM make me what I wonted in the long run it would be cheaper. If you are a machinist and have all the tools then that would be different .


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533rd material ,air defence Oxnard AFB 1953-1955
Pastor of the CBCG-Fellowship group Tulsa Oklahoma.
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post #7 of 23 (permalink) Old 05-22-2019, 02:28 PM
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When I attached mine, I drilled through the extension on one side and countersunk a hole into the barrel, hammered an aluminum pin in and ground flush to barrel contour.

Think twice, shoot once...
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post #8 of 23 (permalink) Old 05-22-2019, 02:34 PM Thread Starter
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Deacon, I may see if someone wants to swap, but the fear of the unknown....

Gem, that sounds like a possibility... I will have to look into that option.

I really like this barrel and it is accurate. I already have a good hunting load figured out and do not really want to work another one up.

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post #9 of 23 (permalink) Old 05-22-2019, 03:17 PM
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Gem did the same as I on a Contender 30/30 barrel years ago for a lite pack rifle. I think I used an AR10 extended brake and reamed it out enough to side over the barrel about 1"

When it absolutely needs to be there, reload

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post #10 of 23 (permalink) Old 05-22-2019, 03:42 PM Thread Starter
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I think a combo of the two is what I may do. I will have to stop by a machine shop and ask what an aluminum tube would cost speced with a .325 hole bored through and 1" on either end bored to 0.808 (or whatever my barrel actually measures). I can drill and peen an aluminum pin in there.

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