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BCM
Durkin Tactical Franklin Armory
User Panel

Posted: 5/1/2009 5:34:13 AM EDT
I checked out the Army/Air Force TM on the M-16 and the part discussing headspace was very unclear to me.  Do you have to take the extractor off?  I gather that the bolt will not lock up on a "go" gauge"... is that correct?  If the bolt closes on a "no go" gauge how is the condition corrected?  What do I need to know?

Link Posted: 5/1/2009 6:13:13 AM EDT
[#1]
Bolt must close on the GO gage, must not close on the NO-GO for brand new rifles. Used rifles must not close on the FIELD gage. The gage referenced in the below drawing is the 5.56 NATO (not .223 Rem) FIELD gage. BSW



Link Posted: 5/1/2009 8:25:19 AM EDT
[#2]
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