slide damage on a 27, has anyone ever seen this before - Page 2
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  1. #11
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    Quote Originally Posted by sivak55 View Post
    Everyone that has a Glock has those marks, as Walter GA said peening..
    I don't find any peening on my 9mm Glocks. Pretty sure the peening is caused by excessive slide speed, the result of undersprung .40s, 10mm, etc.

  2. #12
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    Quote Originally Posted by WalterGA View Post
    Quote Originally Posted by sivak55 View Post
    Everyone that has a Glock has those marks, as Walter GA said peening..
    I don't find any peening on my 9mm Glocks. Pretty sure the peening is caused by excessive slide speed, the result of undersprung .40s, 10mm, etc.
    Excellent point, Sir.
    Thank you for sharing. I have the small marks on a Glock 20 slide. The gun functions perfectly however, I did, recently install a heavy recoil spring after the fact.
    Proverbs 3:5-6.
    Hello all, I'm here to engage in polite and respectful conversation. Just left a very nasty forum where they like to TALK about GLOCK.

  3. #13
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    Quote Originally Posted by They Call Me Trinity View Post
    Excellent point, Sir.
    Thank you for sharing. I have the small marks on a Glock 20 slide. The gun functions perfectly however, I did, recently install a heavy recoil spring after the fact.
    It's pretty safe and prudent to follow Wolff Springs'
    guidelines for picking recoil springs. If your brass is ejected more than about 8', you need a stronger spring.

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  5. #14
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    Quote Originally Posted by WalterGA View Post
    Quote Originally Posted by They Call Me Trinity View Post
    Excellent point, Sir.
    Thank you for sharing. I have the small marks on a Glock 20 slide. The gun functions perfectly however, I did, recently install a heavy recoil spring after the fact.
    It's pretty safe and prudent to follow Wolff Springs'
    guidelines for picking recoil springs. If your brass is ejected more than about 8', you need a stronger spring.
    Thank You, and I agree. Cartridge ejection is what prompted me to install a heavy spring.
    Proverbs 3:5-6.
    Hello all, I'm here to engage in polite and respectful conversation. Just left a very nasty forum where they like to TALK about GLOCK.

  6. #15
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    Quote Originally Posted by They Call Me Trinity View Post
    Thank You, and I agree. Cartridge ejection is what prompted me to install a heavy spring.
    Thanks for the feedback, It not only marked the slide but mushed the the metal and I can feel the bulge which is hanging up on slide action causing malfunction. I am planning on filing those bulges down to see if that clears up the issue. I just can't believe it mushes the metal like that. Sounds like maybe I should get a heavier spring because it's a 40cal.

  7. #16
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    I decided to take a look at my pistols, closely. I noticed that the slide marks or slight gouging in some cases is a result of frame rail contact, prior to the barrel dropping into the locking block. My theory is, no two Glocks are alike. Each is it's own animal. Glock's tolerances by design are loose so I believe these marks are a result of clearancing and break in, generally speaking.
    My Gen3 G23 ( 2006),
    has the most prominent marks, appearing as gouged out of the edge, however it cycles flawlessly and it's buttery smooth.
    My Gen3 G20 (2010),has wear marks in this place on the slide, no gouging. Nothing remarkable. Functions beautifully

    My 3rd is a Polymer 80, 9mm with Brownells long slide and barrel. This pistol is practically brand new. I see slight gouging on the underside of the barrel hood where it drop into the locking block and no wear on the slide.
    No such wear on the G23 or G20 barrel.

    I have a heavy recoil spring in the G20. I find it feeds better and overall, functions better.
    In the G23 and Polymer 80, I'm using factory weight springs.

    Just sharing my observation and what I think about why this is happening. So could it be recoil spring weight? I don't know for sure.
    Proverbs 3:5-6.
    Hello all, I'm here to engage in polite and respectful conversation. Just left a very nasty forum where they like to TALK about GLOCK.

  8. #17
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    This is Frank, I have had him since the ccl was first passed in Texas, many moon ago.

    He is a police trade in weapon and I have shot many rounds since buying him.

    All OEM parts 'cept the lasermax guide spring rod.

    No peening on the slide.
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  9. #18
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    Quote Originally Posted by Otintx View Post
    This is Frank, I have had him since the ccl was first passed in Texas, many moon ago.

    He is a police trade in weapon and I have shot many rounds since buying him.

    All OEM parts 'cept the lasermax guide spring rod.

    No peening on the slide.

    My G23 is a police trade in as well. It has the marks. Came that way. What are your thoughts on the cause? I'm not sold on recoil spring as the cause, at the moment. What I'm showing is worst case. My G20 has small wear marks no metal removal as shown in the pic.The gun still functions fine. It has to be contacting the front frame rail. Maybe sharp edge. I'm not sure.
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    Proverbs 3:5-6.
    Hello all, I'm here to engage in polite and respectful conversation. Just left a very nasty forum where they like to TALK about GLOCK.

  10. #19
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    I stand corrected. The marks line up with the locking block. I did a search and found a comment that explained, the Glock frame flexes during recoil. As a result the locking block lifts ever so slightly when the barrel drops into place, making contact with the frame rail. I'm inclined to believe the comment. The commnentor went on to say that it's not an issue and you shouldn't expect more wear. I still believe that no two Glocks are alike. Thanks
    Proverbs 3:5-6.
    Hello all, I'm here to engage in polite and respectful conversation. Just left a very nasty forum where they like to TALK about GLOCK.

  11. #20
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    Quote Originally Posted by They Call Me Trinity View Post
    I stand corrected. The marks line up with the locking block. I did a search and found a comment that explained, the Glock frame flexes during recoil. As a result the locking block lifts ever so slightly when the barrel drops into place, making contact with the frame rail. I'm inclined to believe the comment. The commnentor went on to say that it's not an issue and you shouldn't expect more wear. I still believe that no two Glocks are alike. Thanks
    Yep - that's slide peening. Worst on the .40 guns. Edge of the locking block rotates up and makes contact with the slide, causing the damage. It's the reason why the third pin was added. A redesign of the frame area in Gen 5 helps mitigate that, and thus, third pin eliminated. Damage gets to a certain amount and then doesn't get any worse. It's fine. Glock will tell you the same thing. I've seen some folks use a stone to hone it down a bit.

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