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m150

  1. 6.8 mm Firearms Discussion
    Hi All. I know about when dpms theoretically started making their riles in spc2/spc II spec. I bought my model m-150 right about the same time they started as far as I know, so I have no idea which spec it is. Trying to find the twist rate is a real pain in the ass with the old jam in a dry...
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