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Old December 18th, 2012, 11:26   #253
redneck12
 
Join Date: Mar 2011
Location: Peterborough
The barrel nut that comes with the Madbull Mk 18 rail works fine with the WE M4, I just highly recommend getting the DD barrel wrench or borrowing one, its a huge pain in the butt to use the standard M4 tool.
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