AnchorArmament Posted November 13, 2008 Share Posted November 13, 2008 What is the longest barrel for an M4? Thanks Quote Link to comment Share on other sites More sharing options...
Unobtanium Posted November 13, 2008 Share Posted November 13, 2008 What is the longest barrel for an M4? Thanks 18.5 inches Quote Link to comment Share on other sites More sharing options...
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