Posted: 8/8/2014 5:56:10 PM EDT
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Hey, there is a threat about BCM in the tech forums where a guy cracked his upper receiver when trying to remove a M4's barrel nut that may have been over-torqued and/or shown to have seized up.
I wondered does BCM use some sort of anti-seize lube on their upper threads before installing a barrel where the nut has to be indexed? Sorry if duplicate. |
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I was looking under the delta ring on mine and there was a white paste under there. Not sure if that is just overflow from the barrel nut or another grease point.
They were talking about BCM barrels being hard to get off and the speculation was between rounded up torque values for indexing, or the nut seizing up. Might have been improper tools, told the guy to use a clamshell receiver vice block, which is what I use and have never had trouble, despite Colt monkey gripping my 6920 barrel to millions of foot lbs. |