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  1. SCAR 17 Upper Material Properties?

    FN SCAR 17S
    I read around that the SCAR 17S uses a 6061 extruded upper receiver. Does anyone here have any knowledge on the SCAR's upper metallurgy? It seems very strange that the manufacturer of such a high-grade rifle would save a little to not use 7075. I realize these aren't high-wear parts, but with...
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