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Old 06-08-2011, 10:36 PM
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AdAstra2009 AdAstra2009 is offline
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Join Date: Nov 2008
Location: Maryland
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Don't know about how many films have this. Your image of the M4 with the M68 CCO is missing the half moon spacer that raises the CCO itself up. Without the half moon spacer the front site obstructs your view through the CCO itself.

this CCO has it.
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