Discussion in 'Technical Questions & Information' started by Munch, Jul 1, 2012.

  1. Munch

    Munch Member

    May 31, 2011
    Puyallup, WA.
    I've been looking all over the internet at pics of other Star BM, and it seems that many, if not most, of the blued variation have the reddish spot in that same spot. I'm led to believe that it is just a matter of the different metal compound in that area, and/or poor blueing practices from the factory.
  2. Jim K

    Jim K New Member

    Dec 6, 2009
    That pistol shows the red more than most, but it was done to all of them. The same heat treatment at the notch was done to M1911A1's and it shows as a half circle dark spot even through the Parkerizing. Many M1911's with unhardened slides have the edge of the notch rounded off even to the point where the slide will not lock back.

    After WWII, Colt went to the hard slide for both their civilian pistols and replacement slides, so the round mark went away.

    Last edited: Jul 1, 2012