Nobody can tell me what this is for
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Nobody can tell me what this is for


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Old 07-01-2015, 10:50 PM   #1
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Default Nobody can tell me what this is for

I received this AR as a gift. I wanted to put a flash hider on the barrel but it looks like someone cut into it.

Can anyone tell me why someone would do this to a perfectly good barrel? Some people were saying it was possibly for a suppressor but they are not sure.

Is there anyway to attach a flash hider without buying a new barrel?

Nobody can tell me what this is for - AR-15 Discussion

Nobody can tell me what this is for - AR-15 Discussion

Nobody can tell me what this is for - AR-15 Discussion
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Old 07-01-2015, 11:00 PM   #2
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I know some flash hiders are "pinned" to the barrel to prevent removal to be legal in some states. Not sure if this is the case here or not.
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Old 07-01-2015, 11:02 PM   #3
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It looks like it had a pinned muzzle accessory to meet NFA rules. What is the length of the barrel? If less than 16", get rid of it and buy another legal barrel.
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Old 07-01-2015, 11:04 PM   #4
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It looks like a pin slot.
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Old 07-01-2015, 11:07 PM   #5
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Or an attempted bubba compensator, if the cut is facing up.
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Old 07-02-2015, 12:55 AM   #6
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Texas,
Two possibilities!
1. If the barrel was less than 16" it had a pinned and brazed flash hider or compensator on the barrel that was removed. If it is presently less than 16" do not put it on your lower! Federal violation! without having the stamp for an SBR.
2. Or it was a Brady Bill commercial market era gun 1994-2004 which was what they called a Post Ban Gun which had to have the muzzle break pinned and brazed as was required, which has been removed?
It never the less had a pin removed and the barrel is undercut so threading it for any traditional flash hider or muzzle break is not possible. You will rather have to have a new unit brazed or pinned on it. Or as mentioned previously get a new barrel.

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Old 07-02-2015, 04:37 AM   #7
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I concur with all of the above!
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Old 07-02-2015, 06:08 AM   #8
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You could use a electric heat gun and fill in the groove with gun sight solder, then over paint to match the rest the barrel?

Or have it cut back and have a Browning type BOSS installed.
Browning's Ballistic Optimizing Shooting System (BOSS) is a patented breakthrough in rifle accuracy. When any rifle is fired, the barrel goes through a series of vibrations as the bullet leaves the muzzle. The variations of these vibrations greatly affect the accuracy of the rifle. Controlling these vibrations will greatly control the accuracy of the rifle. Browning's BOSS allows you to control the vibrations of your barrel so you can shoot groups you didn't think possible.

http://www.browning.com/customerservice/qna/detail.asp?id=107


http://www.browning.com/customerservice/qna/detail.asp?ID=109





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Old 07-05-2015, 07:06 PM   #9
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Rex - do you know if Browning install the Boss on non-Browning barrels?
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Old 07-06-2015, 02:33 PM   #10
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Normally a flash hider or compensator are drilled vertically rather than horizontally as your barrel indicates. The pin is then welded so lit is not easily removed. I would have a smith rethread the barrel (if over 16") and install a hider.
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