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    Index pin undersized by .0002 should it be concerning?

    Just got a barrel with the index pin measuring .12480 Colt TDP spec calls for .1255 +0.000/ -.0005 so .0002 undersized I have another barrel from the same company measuring .12505 should this be concerning at all? The .1248 index pin is not sloppy in my upper receiver mouse hole/index pin slot...
    • URGILOVERR
    • Thread
    • advice or expertise ar15 armorer barrel gunsmithing indexpin tdp technical
    • Replies: 92
    • Forum: The Armory
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