Anjin-san Posted September 15, 2020 Share Posted September 15, 2020 NIB unfired M4 - the mag tube nut tightens up just fine, but does not click while tightening. I have seen several M4 field strip videos and the nut clicks while tightening. Its designed to do this to stay tight. Am I missing a part of the nut? Do I need to find a new one? Does it not really matter? Quote Link to comment Share on other sites More sharing options...
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