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Old July 4, 2013, 08:19 PM   #14
Join Date: September 30, 2009
Posts: 51
Take the upper off. Pull the charging handle as far as you can before the bolt drops free. Put one finger on the rear of the bolt. Now gently slide the bolt forward till you feel resistance. Look inside and see if the gas tube is the cause of the resistance.

It would be very kind of the OP to come back and post as many times as it takes till this gets resolved.
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