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spencerhut · December 3, 2009, 10:18 AM

So I was helping a buddy build his first (civilian) AR last night and when we took the muzzle brake off to install a low profile gas block it seemed harder than normal to get the brake off. I thought it was Locktite, but it was not. Look carefully at the image and you can see an almost perfect round deformation in the threads, like the barrel was drilled and filled with a dissimilar metal?

I was going to get a 1/2-28 die and clean it up, but thought I should mention it here first to make sure I'm not missing something.

BTW - I have the exact same part number barrel on my wife's AR and we did not have this issue with it.

December 3, 2009, 10:18 AM	#1
spencerhut Senior Member Join Date: March 18, 2006 Location: Idaho Posts: 147	AR Barrel (DPMS) thread problem So I was helping a buddy build his first (civilian) AR last night and when we took the muzzle brake off to install a low profile gas block it seemed harder than normal to get the brake off. I thought it was Locktite, but it was not. Look carefully at the image and you can see an almost perfect round deformation in the threads, like the barrel was drilled and filled with a dissimilar metal? I was going to get a 1/2-28 die and clean it up, but thought I should mention it here first to make sure I'm not missing something. BTW - I have the exact same part number barrel on my wife's AR and we did not have this issue with it.