Posted: 7/31/2011 8:08:30 AM EDT
|
One of my officers picked up a used Gen 1 17 several months ago. Since he has had it, it consistantly fails to extract under recoil. We replaced the extractor and spring and it's been back to glock once. They stated nothing was wrong.
The problem is consistent across all ammo and with multiple shooters. I am positive limp writing is not a factor. Any ideas? |
|
Quoted:
Swap barrels for a day! Yeah, at this point it probably makes sense to start eliminating variables. Weird that it continues to fail to extract with a new extractor, extractor spring and recoil spring. Hell, it's been back to Glock! When you say it is failing to extract, does that mean that the spent shell is left in the chamber when the slide cycles, or that the slide gets jammed partially out of battery with the spent shell partially extracted but stuck? |
|
The spent case moves about 1/8th inch or so rearward and then the extractor comes off leaving case in chamber. Best I can figure the case isn't getting enough time to contract before the slide begins to move, but that is just a guess.
Gun hand cycles just fine. Fired it yesterday and first mag ran fine. Second mag began having issues on the 3rd round and it got worse the more it was fired. |
| At this point, I'd try everything. Maybe pick up a few new G17 mags to try with it. Weird that it handcycles fine, but FTEs during live fire. Interesting thought on premature unlock, but I would have thought the new recoil spring would bring that back to spec. Keep us posted! |
|
Glocks are like kids teddy bears. They like to be squeezed really tight. Try using a factory mag (with a good spring and follower: Gen 1s suck ass) and some +P or NATO loaded ammo.
Squeeze the gun firmly when firing and you should get some good results. If not, send it back to Glock and have them make it right. |
|
i am also thinking he has an aftermarket recoil spring. weren't these plastic? this has a stainless guide rod with an allen screw on the end. is that correct for a gen 1 gun? could he have the wrong power spring installed?
think i need to borrow a recoil spring to try also. |
|
Having come from the 1911 platform I have had this exact issue on my old 1911.
It was a bad mag spring that consistently missed the extractor groove and subsequently had a failure to return to battery; the other thing it would do is refuse to toss a shell out and the extractor would release the case way too early. Get Glock factory mags, preferably Gen 3 iteration mags or newer (I run my Gen 3 G19 with the current Gen 4 mags with the cutout opposite the stock mag catch configuration.) Minimize the variables like so, check one at a time in this order: 1. Mags –– for Glock, use factory 2a. Recoil spring 2b. Springs related to firing assembly if light strikes occur 3. Extractor assembly 4. Locking block 5. Check all pins 6. Firing pin/striker assembly 7. Barrel 8. Full detail strip to check for worn out parts/ worn frame More likely than not you'll usually clear up all issues by step 4. I hope that helps! |
|
Quoted: i am also thinking he has an aftermarket recoil spring. weren't these plastic? this has a stainless guide rod with an allen screw on the end. is that correct for a gen 1 gun? could he have the wrong power spring installed? think i need to borrow a recoil spring to try also. definitely aftermarket guide rod and spring |
|
Put a stock recoil spring assembly in. If it had that after market spring assembly in it when it went back to Glock, they would have replace it with a stock one.
Sounds like it could have a stronger recoil spring in it for +P+ rounds. Use Glock mags with stock followers and spring. Dave N |
|
Quoted: Just noticed the first mag fired was a factory mag. The other mags were kci. Can a mag cause that? Yep!!! It is most likely the guilty culprit. I had the same issue with a pro-mag back in the late 90's..... I am a fan of using everything that comes on the Glock. No after-market add on. Could be the recoil spring but will guarantee that the non OEM mags are the issue. I only use Glock factory mags and I learned that the hard way! I have tried to save money a couple different times and got burned each and every time!!!! Go with factory all the way... Just my .02 Amos1909 |
|
Quoted:
Just noticed the first mag fired was a factory mag. The other mags were kci. Can a mag cause that? Since it's a Gen1 gun, I'd try an original non-drop free mag. Just an idea for something to try. Also that spring is an aftermarket piece. The gen1 had a non-captured rod & spring but they don't make those any more. Just try a standard glock spring. Best of luck! |
|
Quoted:
The spent case moves about 1/8th inch or so rearward and then the extractor comes off leaving case in chamber. Best I can figure the case isn't getting enough time to contract before the slide begins to move, but that is just a guess. Gun hand cycles just fine. Fired it yesterday and first mag ran fine. Second mag began having issues on the 3rd round and it got worse the more it was fired. Have you replaced the spring on the spring loaded bearing? That's what provides "tension" on the extractor. |
|
yes that whole assembly.. extractor, rod and spring have been replaced. he told me he bought a new recoil spring as well so i am guessing thats where this after market one came from although he told me it was a factory recoil assembly.
i'll play with some mags this weekend and see if i can change the symptoms. |
|
Quoted: yes that whole assembly.. extractor, rod and spring have been replaced. he told me he bought a new recoil spring as well so i am guessing thats where this after market one came from although he told me it was a factory recoil assembly. i'll play with some mags this weekend and see if i can change the symptoms. Let me know if you need some help. |
| Make sure that you have the PROPER extractor for the gun. You said it's a GEN 1, so it probably has the old style extractor on it. My Gen 2 also has an old style extractor on it. There is something they changed in the slide from early Gen 2 to later Gen 2, 3, 4. |
| Aftermarket magazines could cause failure to extract, but it's not that common at all. Having no magazine in the gun when it's fired will cause sporadic failure to extract. A light guide rod spring could also cause failure to extract, put a brand new stock guide rod assembly in the gun before you consider anything else. Also, having a "tight" extractor could cause failure to extract. By "tight" I mean there could be gunk built up on the extractor or in the space in the slide that the extractor fits into. It could also mean that the extractor is out-of-spec, which is more common than you'd think with Glock's newest extractors. And it may also be caused by tough buildup in the chamber, try cleaning the bore with a phosphor bronze bore brush instead of those plastic brushes. |
|
Well,
Being a long time glock guy... I'll second that... Factory mags...4th gen preferred.. That doesn't sound like a factory spring...not even in the land of oz...get a factory spring back in there...that sounds like the adjustable aftermarket springs for hot reloads and such.. After those two issues...I'd say check the extractor...even glocksmiths make mistakes...especially on an older piece... Send up a pic of the extractor if you can if the previous items didn't fix it...either me or the others here should be able to identify it as circa gen1 or not. Lastly I'll ask but don't be offended, what shells are you using? Factory fresh, not seconds right...I had somebody bring their glock over saying it wasn't workin right and the gun shop they went some how...I'll leave them the benefit of the doubt...sold them a box of factory seconds...there was a small dent on every case in the same location that was causing the not feed right 100%...I do know quite a few gun shops than handle seconds and if one got swapped...yepmits hydra shock...seconds...not too good for anything than landfill IMO Report back, B |
|
well it's fixed but i am not 100% certain what did it.
he had replaced the extractor with a new one just before giving it to me. i started off by ordering a new plunger spring and bearing. <as well as borrowing a know good recoil spring> i replaced the extractor group loaded it up and it ran like a top with every mag. i can't tell any real difference in the parts but it's running now. i did notice the kci mags seems to feel like they are causing the slide to drag a bit vs factory mags so maybe that was causing issues with it as well. oh well he's happy and it's running. still have no clue what exactly fixed it 
|