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California handguns Discuss your favorite California handgun technical and related questions here. |
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#41
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crosseyed, that's a lot of dry firing! this is actually old news. it does happen. since you are a student, the cheapest route would be to contact glock and you would simply send the complete upper. nothing really to it.
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"I'm not in this world to live up to your expectations and you're not in this world to live up to mine." Bruce Lee |
#42
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I didn't believe this at first but after a google search of "glock gen 3 breach face" this was the first result
http://www.m4carbine.net/showthread.php?t=92986 when you dry fire do you let the slide run forward under the power of the recoil spring or do you ease it forward? I ask because of the circular crack seams curious
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I will share my opinion and my load data, BUT I am just a guy with too many cigars and too many guns. Whatever I say is probably wrong. |
#43
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You only have to cycle the slide about 1/4" to reset the trigger during dry fire sessions. No reason you need to fully rack the slide every time.
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My friends and family disavow all knowledge of my existence, let alone my opinions. |
#44
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While breech faces can crack from dropping the slide on an empty chamber -- 1911's especially! -- it doesn't seem like that's what happened here. They break in a circle like that because the rest of the breech face is supported by the barrel and cannot move forwards. The part that covers the chamber isn't supported by anything. Whether it's the striker slamming into the back of it and cracking it along the line where the support ends, or the breech face cracking due to its own inertia when the slide slams into battery w/out a round going into the chamber and acting like a buffer then acting as breech face support itself when it headspaces, the crack from either cause will look similar for the same reason (supported area vs. unsupported).
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#45
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Glock marketing perhaps? I seem to recall Glock claiming that dry firing was okay. But that was 20 yrs ago and my memory may be failing.
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Ruger MkII Target .22lr Glock 19 Gen2 - Glock 19 Gen3 - Glock 26 9mm Colt Python 6" - Ruger KGP141 .357 Glock 33 357SIG - Sig Sauer P250SC .40/357SIG Glock 23 - Glock 27 .40 Glock 20 - Glock 29SF 10mm Desert Eagle MkVII .44 Sig Sauer P220 - Sig Sauer P227R - Sig Sauer 1911R - Glock 30SF - S.A. 1911 Mil Spec .45 |
#47
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Glock knew there was a problem with the Gen4s as well. Anyways, If it is firing pin related, the snap caps with the little rubber piece to catch the firing pin are probably too soft, and I would imagine the pin still hits the back of the breach-face like that, though, slightly cushioned. |
#48
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That's how doctors write!! |
#49
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It won't break?? In my 23 years of 100ks of rounds shot, 9 years of FFL and handled 100s of guns, Glock was the only one broke/blewup/brass-in-face on me. But this one is news to me... and it seems to be a common problem too. I wonder how my Gen2 G19 from 1989 with 100ks dry firing is holding up.
You don't have to pull the slide all the way back and slam it to dry fire. about 1/2" rear ward would cock it. the circular breakage seems to be 'peening' effect from the barrel hood with empty chamber. Actual firing ping strike shouldn't cause that. I believe the pin would break off before taking out a chunk that big. Anyway, I've lost faith in Glock long ago... after i understood faith requires no empirical proof.
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GCC NRA Certified Pistol Instructor Don't count your hits and congratulate yourself, count your misses and know why. Last edited by huckberry668; 01-21-2013 at 10:16 PM.. |
#50
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Thanks for letting us know of a possible problem. I'd like to hear Glock's take on this defect when you talk to them. |
#51
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I will share my opinion and my load data, BUT I am just a guy with too many cigars and too many guns. Whatever I say is probably wrong. |
#52
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#54
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Dry firing would not cause this issue. It is a slide defect.
Notice the fracture on the breach face is suspiciously the same diameter of the bullet casing? The casing is going to provide more force on the breach face then the firing pin ever will. The action of the pistol firing would create that fracture but given geometry of the slide would not allow it to travel rearward, only forward. Hence why the firing pin would be the determining force to push the breach forward. DRY FIRING IS NOT THE ISSUE. DRY FIRING A GLOCK PISTOL WILL NOT CAUSE DAMAGE. This is a factory defect plain and simple, contact Glock and they will resolve the issue.
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"If it wears out, replace it. If it breaks, upgrade." -Cranky Air Force Vet. Kevin |
#55
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OP 800 rounds its a QC issue no doubt. |
#56
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My Glock 19 is about 14 years old and hasn't cracked through more dry fires than I care to imagine. By contrast, my M&P firing pin broke with dryfire within weeks of owning it. I am certain this type of failure on a Glock can happen, but it is likely very very rare.
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"When you get the (men) to the range, you just get the men. But when you bring the (women) to the range, you get the (whole family). And that's what's going to save our 2nd Amendment."--Dianna Liedorff "Since self-preservation is the 1st law of nature, we assert the...right to self-defense. The Constitution...clearly affirms the right of every American...to bear arms. And as Americans, we will not give up a single right guaranteed under the Constitution." --Malcolm X |
#57
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From a Mechanical Engineer's Perspective...
My engineering coworkers and I took a look at this and we have a question for you. Have you allowed the slide to slam against the chamber w/o a snap cap repeatedly? If there was a manufacturing defect, such as improper hardening, repeatedly allowing the slide to slam against the chamber face would fatigue the metal and cause the crack to appear.
IMHO the striker did not cause the original crack, it was just the straw that broke the camel's back. Contact Glock and they should give you a new slide under warranty. But, do answer if you have repeatedly allowed the slide to return unhindered (i.e. letting it slam shut instead of controlling it with your hand). It will help us all in determining how the crack happened. Last edited by madsend81; 01-22-2013 at 7:31 AM.. Reason: Added Title to Post |
#59
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#60
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Why dry fire a zillion times without a snap cap anyway?
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#61
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Just doesn't make any damn sense does it? This thread is just weird.
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#62
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The striker is propelled by a ~5.5# spring. The surface of the striker that makes contact to the back side of the breech face is ~1/8", the channel is slightly larger, maybe 5/32". The breech face thickness where the striker hits is ~1/16" thick. The striker could not possibly blow through the breech face. If it did manage such a feat, the crack or hole would not match the case diameter of a 9mm. It would be closer to the size of the striker channel.
I appreciate the OP posting a photo, which legitimized the damage but I still stand by what I said. Their was obviously damage to the slide from something else, not from dry firing. The rounds absolutely create more force to the breech than the firing pin, doesn't matter if the cartridge is flush to the breech face. The striker isn't heavy enough, being propelled by a 5.5# spring 1/4" to create sufficient pinging to create that damage. I'm not some glock fanboi, I'm just dispelling a common glock myth that dry firing a glock will blow out the breech face. |
#63
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Old news. My theory is that the breach face weakens in a circular fashion (casing) as seen in the picture by the explosions of chambered rounds. Then constant dry firing continues to put stress on this circular weakpoint until it eventually cracks. The slide may have been improperly heat treated/hardened? No idea as to why it happens to some and not others.. At any rate, I will not hesitate to continue dry firing my glock. I look forward to the day it breaks
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#64
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FUD.....glocks cant break from dry firing becuz all the glockbois says so. They also say tires on ur trucks dont wear down faster if u drive drive with a heavy foot and perform drift maneuvers on tight turns.
Hence I use snapcaps on all my guns.
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"Screw U guys, I'm going home"...:the great Eric Cartman 10mm. Because .45ACP just doesn't cut it anymore. <Trailerparktrash> |
#67
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I have had to contact Glock myself a few times. They will repair or replace new or even used guns(industry trade ins,ect.) if you ware them out as long as they are stock so if you have to send it back be sure you remove all non factory parts.
Contact Glock and follow the directions they give you. Be prepared, it cost me $85. to ship to them via FedEx. Check UPS for a price. Same day overnight only. Give them a chance,they stand by their product. Good luck!
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" A Free People Ought Not Only Be Armed And Disciplined But Should Have Sufficient Arms And Ammunition To Maintain A Status Of Independence From Any Who Might Attempt To Abuse Them, Which Also Includes Their Own Government." ~George Washington~ |
#71
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thats a silly personal attack and it should be beneath you to say that to a fellow Calgunner. My writing is kind of sloppy as well... Ever had to write in a back of a turbulent vehicle going lights and sirens? not everyone writes prissy and straight. Its like watching the gait of a sailor on land. You can always tell a man that has spent his life on the water. He has a rolling type of walk. My writing is like that I guess. As long as I can read it then its fine. Maybe I am over reacting but this comment just set me off.
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#75
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Funny how those of us who train with and carry handguns as a regular part of our lives tend to agree on certain things... "All guns should be Glocks, all Glocks should be 9mm, and all Glock 9mms should be 19s" |
#76
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Can we turn the discussion to something that may be more generally helpful than the like or dislike of Glocks?
Based on the information in this thread so far, the general consensus seems to be that this is a defect that is unlikely to be very common (Gryff suggested that it's a 1-in-100000 occurrence, and IPSICK suggested that this is an overestimation which may be off by a factor of 10 or 100.) So, my question is: When I purchase a new Glock (or ANY handgun for that matter), how many rounds should I put through it in order to satisfy myself that my new Glock (or other handgun) is not defective? Is there a minimum number? In other words, what's the best way to ensure that this type of defect doesn't present itself when your life is on the line? It seems to me that this question is a valid question, regardless of whether we're talking about Glocks, Sigs, S&W, Ruger, or whatever. |
#79
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#80
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I am not surprised. After all, we learned in this thread:
http://www.calguns.net/calgunforum/s...ighlight=glock that GLOCKs only last 4 years... Interesting failure. I am going to inspect my GLOCKs and see if any of them have any cracking. |
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