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Is wear normal?

Discussion in 'Gunsmithing' started by SCF, Jan 17, 2012.

  1. SCF


    Nov 19, 2011
    Here are some pictures of the wear marks on the bottom of a G34 slide, underneath the ejector/extractor port.

    Would you consider this normal? The pistol has about 1000 rounds through it.


    Last edited: Feb 12, 2012

  2. glock_collector


    Dec 23, 2011
    Ah, a case of the mystical slide peening..How many locking blocks later? I believe I was told 19 versions... The bur should be removed if noticeable, other wise a heathly and steady diet of practice ammo and it will not progress further.
  3. cciman


    Jan 19, 2009
    SW Ohio
    Normal indicator of used glock. Ignore it.
  4. MDI17


    Nov 14, 2012
    Roanoke, VA
    The photos of the damage to the inside of the slide....that is exactly what mine has done. Good to know it's normal...and OK. Thanks
  5. unclebob


    Oct 14, 2000
    Mary Esther FL
    Take a small file and fill off any raised edges. One time deal and it will not do it anymore. It is very normal.
  6. Arc Angel

    Arc Angel Deus Vult!

    Sep 20, 2003
    Penn's Woods
    :upeyes: What others are calling, 'normal' in this thread I would call highly unacceptable for any 9mm Glock. As far as I'm concerned it looks like the slide wasn't properly heat treated. I've got Glock pistols around here with anywhere from 15,000 to 25,000 fired rounds through them - Many of these rounds were really hot, too! NONE of my slide bottoms show even 1/10th the slide peening that yours does; and, two of these Glocks are 45 ACP caliber!

    Will your G-34 work? Yes, it will. Will your G-34 shoot straight? Yes, straight enough. Is that kind of slide peening typical of, 'many' Glocks? In my experience, fewer pistols rather than more. To my mind this is just more proof positive that Glock pistols ain't what they used to be. I've got two very good early third generation G-21's that are everything that they should be and are standing up well. I've, also, got a G-19 with what has, so far, been a, 'manageable' BTF problem. Unless I come across an early Model 19 with a serial number prefix lower than, 'L' I am positive that I ain't never going to buy another Glock anything. :freak:

    PS: Unclebob gave you good advice! The only question I have is, 'Do you actually know how to touch-up a lock block?'
    Last edited: Nov 16, 2012


    Jul 28, 2012
    SE Kentucky
    FWIW, have a Gen4 G35 with several thousand rounds and it has no markings whatsoever! Gen4 G26 with ~500 rounds, and only a very slight wear mark in this area.

    IMO, this would not be "typical" of any quality handgun!

  8. unclebob


    Oct 14, 2000
    Mary Esther FL
    A Glock is designed to flex. So with the different manufacture tolerances of parts you may or may not get the ping marks. So you just take a file and file off the bumps. It will not happen anymore. And it is not any big deal.
  9. Shockem841


    Sep 6, 2012
    yep its normal for glocks. mainly in .40 but i have seen this in older 9mm glocks as well.
  10. fastbolt


    Jun 9, 2002
    CA Central Coast
    Locking block peening on those spots on the underneath of the slides is not exactly uncommon with Glocks, but it's usually been observed to have occurred more frequently, and to a great degree, in the .40 models.

    Glock has revised their locking blocks over the years, and we were told in one of my armorer classes that at least one of the revisions ought to have reduced the potential for such peening.

    FWIW, one of my G26's actually developed more peening of this type than my G27. ;) It started rather early in the gun's service life (and has now seen more than 13K rounds fired through it).

    I've seen a little develop in my newer production Gen3 G26, but then it's only seen a couple thousand rounds, so far.;