Well depending on whats is available I have bought Monarch 55grain .556 from academy, and have bout 2 cases of .556 m193. The cases are waiting for a Magpul Dynamics Class in October so I guess I ought to run a few mags of those to make sure its going to feed/fire. When reading about receiver extentions on the AR Technical Discussion Knowledge Based Threads I believe that I read that the milspec has a different thread then the commerical ones, if that is true will a milspec fit on my commerical receiver?
Matt


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