Posted: 12/12/2012 5:39:25 PM EDT
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Not so sure that extractors and ejectors are the problem, instead a cheap band-aid fix.
So a co-worker just bought a Gen3 G17 this past weekend, after hearing about the BTF issues, and decided to take a chance. We both thought that the internet over-hyped the BTF issues and were confident he would be alright with his purchase. I own six glocks, this was his first and probably last according to him.We took my Gen3 G34, with a born on date in 2005, and his Gen3 G17 with a S##-### serial number to the range today after work. His is brand new, no trigger job, still with plastic sights, cleaned of the copper grease and re-lubed with CLP. He started getting BTF right off the bat, 3 different kinds of ammo. We took our guns apart and started swapping parts from mine to his, to see when the problem went away. We ended up swapping everything but the slide, sights and channel liner. We even tried my barrel in his upper, and besides looking funny it still was ejecting them not far at all or straight back. My G34 has always been 100% with good ejection. I read somewhere that a guy on a forum measured (I believe) the cutout in the slide for the extractor with a pistol that had ejection problems to one without and came up with two different measurements. That got me thinking, so we put all his internals in my gun...threw brass just fine!! He had a 336 ejector and a dipped extractor that ran like a champ in my gun!! Swapped back all internal parts, and decided to swap uppers. Now the G17 upper on my lower still runs bad, and G34 runs fine. Seems that the problem stays with the upper, but having swapped all the upper components except the sights (not a likely problem), and channel liner (again-not likely), that leaves only the slide (hmmm, might have something here). So my thinking is that the slides are machined a little off according to the previously referenced post, that I cant find, if someone knows what I'm referencing here post it up, and that the new ejectors and extractors and being made to work (or not) with a faulty part. Edit-Here is the post I was referring to: http://www.ar15.com/forums/t_5_13/123932_Possible_explanation_for_the_weak_ejection_problem_exhibited_by_newer_Glocks_.html |
Shouldn't have removed the copper grease, per the manual; that's the genesis of your friend's problems!  *
*Actually, I think you've discovered the real problem. It's the machining of the slides in America. The Germans/Austrians have always been better at precision work like that. |
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I've come to the same conclusion from extensive reading. It has to be the extractor channel in the slide or the trigger housing channel in the frame. Extractor/ejector combos work for some guns but not other. Others apparently can't be fixed with either or both. My guess is that since Glock has had such a high demand they are letting slightly out-of-spec slides pass. Glock is still back-ordered what, 600,000 guns? The ejection issues started around the time of the frenzy buying/Gen 4 introduction. You get some guns that are in-spec but some that aren't. Quoted: Shouldn't have removed the copper grease, per the manual; that's the genesis of your friend's problems! **Actually, I think you've discovered the real problem. It's the machining of the slides in America. The Germans/Austrians have always been better at precision work like that. My Austrian made G19 has BTF issues. The majority of Glocks in the US now are still Austrian made. |
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Randy Lee of Apex Tactical posted on another website that he too believes the ejection port needed to be lowered.
I think he actually lowered the ejection port on a couple of Glock 19 slides and they all worked peferctly afterwards. I don't believe they offer that service however. I do know that the Apex extractors sell out as soon as they become available. The Apex extractors seem to be solving the BTF problem. I do not have one in my G19 so I can't say for sure if they do or not. I sent mine back to Glock and it came back with the newer 30274 ejector and it worked better. I also replaced the spring loaded bearing on the extractor depressor plunger with a non-LCI bearing,which is thicker at the end, and that seemed to solve my BTF problem. So for me it was the 30274 ejector and the spring loaded bearing I installed which made the big difference. You can get that bearing at Glockparts.com,can't remember the part number. |