indexpin

  1. U

    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...