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AR15.COM
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1/14/2016 1:33:36 AM EDT
Has any one ever figured out a good way to keep it from backing off after shooting with it??
1/14/2016 10:37:27 AM EDT
[#1]
I've got a 2006 model year M4-2000 that uses the same mount and haven't had any issues.  Is the spring a wear item?
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