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Old 03-26-2011, 23:44   #2
Constructor
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Join Date: Dec 2009
Location: Roaming
Posts: 538
No it doesn't help keep it cool. Someone probably thought it would be easier to control with more weight on the end. IMO the M4 barrels are backwards, under extended firiing sessions the barrels are heating up and swelling in the thin area under the guard. The Mil is going back to a heavier profile, the mid weight "Socom".
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The 6.8 is the fastest growing cartridge and #1 choice for hunting deer and hogs with an AR15.

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Last edited by Constructor; 03-27-2011 at 11:44..
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