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Old October 12th, 2011, 14:12   #20
huang
 
Join Date: Dec 2001
Location: Scarborough
The rail is exact 7''. I think the issue maybe the madbull barrel nut probably 2mm longer thant the stock one.Hence there is small gap between the rail and the ring.

This rail 's stock barrel nut fits AEG only which is bit smaller than the GBBR.
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