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Old April 28, 2012, 02:32 PM   #78
Senior Member
Join Date: May 31, 2011
Posts: 113
Troy vtac alpha rail. I'm not sure if I was an isolated case, but the three mounting washers inside the rail didnt fit over my low profile gas block. Had to take one off, pull the rail half on, then reinstall the washer&screw.
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