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HK 网上解释了为啥没有 chrome lined，那么估计是商业噱头？？[size=10.6667px]Like the famous HK416, the MR556A1 uses a German-made barrel produced by [size=10.6667px]Heckler[size=10.6667px] [size=10.6667px]& Koch’s famous cold [size=10.6667px]hammer[size=10.6667px] [size=10.6667px]forging process. The highest quality steel is used in this unique manufacturing process producing a barrel that provides superior accuracy and long service life.
[size=10.6667px]But unlike the HK416, the MR556A1 does not use a chrome-lined barrel. Chrome-lining can sometimes mask bore imperfections and negatively affect accuracy. For the new series of [size=10.6667px]Heckler[size=10.6667px] [size=10.6667px]& Koch semi-automatic MR [size=10.6667px]rifles[size=10.6667px], HK designers and engineers believe best accuracy comes with an unlined bore.
[size=10.6667px]Used with the HK Free Floating Rail System, the barrel does not touch the [size=10.6667px]handguard[size=10.6667px], ensuring the barrel is truly free-floating for maximum accuracy.
[size=10.6667px]The unchromed barrel has an internal profile of 6 lands and grooves with a 1 in 7 inch (178 mm) twist. It is also moderately “swagged” with a slightly smaller internal diameter at the muzzle end than the chamber end. This feature has a positive effect on bullet accuracy and velocity. The thick, heavy contour 16.5-inch MR556A1 barrel also contributes to its excellent accuracy.
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楼主
发表于 2016-3-17 13:53
发表于 2016-3-17 15:36
