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Old September 4, 2008, 06:13 PM   #1
johnwilliamson062
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Accessory threads for .223

what are the norms? I know there is a "standard" one for AR-15s, I assume I should just use that.
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Old September 5, 2008, 12:36 AM   #2
hockeysew
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1/2 x 28 Right hand is the normal thread for an AR
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Old September 5, 2008, 09:31 AM   #3
johnwilliamson062
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are there any other threads I should consider? I am assuming the AR thread is by far the most common for accessories. Is there a thread which has some sort of advantage?
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Old September 5, 2008, 04:10 PM   #4
Harry Bonar
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AR barrel

Sir;
In threading your AR barrel with a die instead of a lathe be sure you start the threads square.
One way I did it was to mount the barrel in my three jaw chuck and use the tailstock to center the die in starting on the barrel - but when you do that, if you have a lathe go ahead and thread it anyway. Always thread to a shoulder and when you tighten it up do NOT use much pressure - you'll expand the barrel at the joint. Use "peel washers."
If its for a muzzle flash hider or brake use a "VORTEX" flash hider.
Harry B.
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Old September 9, 2008, 10:16 PM   #5
johnwilliamson062
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Harry, don't worry, I am writing a check. I don't have the equipment to do this myself.
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