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2/25/2013 6:25:03 PM EDT
I bought a BCM bolt carrier group and in the plastic bag, there is a loose rubber O-ring. What is this for? Where does it fit?
2/25/2013 6:31:16 PM EDT
[#1]
See the following post
Newby to BCM dumb question re bolt carrier group
2/25/2013 6:37:54 PM EDT
[#2]
Thank you very much. That thread didn't show up in my search.
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