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Quick question for those in the know: Is it possible to overtorque the barrel nut on the M4? I tightened it as hard as I could (one hand on the upper and one on the armourer's wrench), then I backed it back a notch so the gas tube could fit, but now thinking about the strength of that upper's aluminum is making me a tad uneasy.
I will say that barrel is rock solid now.
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