Asked by geoz48 on June 8, 2017

What kind of steel is the barrel?

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Carbon steel, 4140. You would think on a "Military & Police" model they would use 4150, but they actually are made with 4140 apparently after having researched the company info and doing their wiki page search.

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Smith & Wesson M&P 15 11515

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geoz48 on November 3, 2018
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