It is suitable for use in most weapons with a 1-in-7 barrel twist. The M855A1 has a copper-jacketed steel core, differing from the previous M855 round which has a lead core. The so-called “green ...
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Gray Zone Warfare: How to Build the Smallest SBR M4and packs a punch with M855 ammunition in each magazine. Here’s how to build the SBR M4 in Gray Zone Warfare! How to Build the SBR M4 in Gray Zone Warfare To build the Short-Barrel Rifle M4 in ...
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