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Posted: 4/16/2024 10:00:13 PM EDT
I have a Spike's Glock 9mm lower and need to tune the ejector to a BRN-9 upper. Broke one trying to bend it upward to get close to the top of the channel.
I didn't heat it the first try - if I heat the replacement ejector will I be able to raise it? Are there other ejectors out there that aren't hardened that I can bend? |
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USA
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Posted: 4/16/2024 10:17:21 PM EDT
[Last Edit: SAN14]
[#1]
I don't have one of your brand of PCC but do have a few others. I have found lots of
good info. for making PCC's run good at this site. He is on here occasionally and might give you a more direct answer. https://blowback9.wordpress.com/ One of his latest articles dealt with adjusting the ejector on a FM-9 which may help you fix yours. |
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MN, USA
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Posted: 4/16/2024 11:11:29 PM EDT
[Last Edit: s4s4u]
[#2]
Originally Posted By criley: I have a Spike's Glock 9mm lower and need to tune the ejector to a BRN-9 upper. Broke one trying to bend it upward to get close to the top of the channel. I didn't heat it the first try - if I heat the replacement ejector will I be able to raise it? Are there other ejectors out there that aren't hardened that I can bend? So all you want is something that is soft enough to bend and yet hard enough to withstand the constant beating of a steel/brass case at 1000FPS? LMK? |
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Posted: 4/17/2024 12:57:08 AM EDT
[#3]
Quote HistoryOriginally Posted By SAN14: I don't have one of your brand of PCC but do have a few others. I have found lots of good info. for making PCC's run good at this site. He is on here occasionally and might give you a more direct answer. https://blowback9.wordpress.com/ One of his latest articles dealt with adjusting the ejector on a FM-9 which may help you fix yours. Thanks. I saw where he heated his - guess I will give it a try. |
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USA
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Posted: 4/17/2024 10:50:22 AM EDT
[#4]
Did you read completely through the article? Method #2 might be a viable option for you depending on how the ejector is mounted. I looked at Spikes site but can't tell just how they mount it. |
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Posted: 4/18/2024 12:52:53 AM EDT
[#5]
Yes, read all the article. Spike's ejector doesn't lend itself to option 2.
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Posted: 4/18/2024 3:13:28 PM EDT
[#6]
So all you want is something that is soft enough to bend and yet hard enough to withstand the constant beating of a steel/brass case at 1000FPS? Hyperbole? It's more like 18ft/sec and the case is only a few grams. The ejector has to pivot one side of the case around the extractor, not absorb all the inertia. A strong but bendable steel ejector will be fine. My old spikes ejector wasn't hardened, or not hardened much, and it bent right into place. Still looks new. The newer ones seem to be hardened more than before and snap. OP - I wrote that article. I heated the FM9 ejector until it just started to glow and gave it a little bend. 2 times and it was exactly where it needed to be. Still looks perfect. |
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MN, USA
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Posted: 4/18/2024 3:49:46 PM EDT
[#7]
Quote HistoryOriginally Posted By Droppoint: Hyperbole? It's more like 18ft/sec and the case is only a few grams. The ejector has to pivot one side of the case around the extractor, not absorb all the inertia. A strong but bendable steel ejector will be fine. My old spikes ejector wasn't hardened, or not hardened much, and it bent right into place. Still looks new. The newer ones seem to be hardened more than before and snap. OP - I wrote that article. I heated the FM9 ejector until it just started to glow and gave it a little bend. 2 times and it was exactly where it needed to be. Still looks perfect. Just saying that the ejector is likely going to be too hard to simply bend, other than slight adjustments to get it nearer the bolt face. Perhaps a bit dramatic, but this is arfcom 
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Posted: 4/18/2024 5:17:41 PM EDT
[#8]
Quote HistoryPerhaps a bit dramatic, but this is arfcom LOL! True that! |
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Posted: 4/18/2024 8:50:09 PM EDT
[#9]
Quote HistoryOriginally Posted By Droppoint: Hyperbole? It's more like 18ft/sec and the case is only a few grams. The ejector has to pivot one side of the case around the extractor, not absorb all the inertia. A strong but bendable steel ejector will be fine. My old spikes ejector wasn't hardened, or not hardened much, and it bent right into place. Still looks new. The newer ones seem to be hardened more than before and snap. OP - I wrote that article. I heated the FM9 ejector until it just started to glow and gave it a little bend. 2 times and it was exactly where it needed to be. Still looks perfect. Super to hear direct from the source. Thanks! I take it that you heated it then bent it... let it cool and tested it... then heated it again and bent it and it fit. Did you attempt to re-harden it when you had it adjusted? |
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Posted: 4/19/2024 8:14:29 AM EDT
[#10]
Quote HistoryOriginally Posted By criley: Super to hear direct from the source. Thanks! I take it that you heated it then bent it... let it cool and tested it... then heated it again and bent it and it fit. Did you attempt to re-harden it when you had it adjusted? Correct. Remove, heat, bend slightly, cool, install, check. Repeat until perfect fit. I used a MAPP gas torch, but propane would work. I didn't try to re-harden it. I don't have harness test files, so I wouldn't have been able to check it if I did. Other than the surface blemish where heat was applied, it looks and works fine. No signs of bending, stress, or fatigue (so far). |
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Posted: 4/19/2024 10:28:36 AM EDT
[#11]
Thanks! Will tackle that soon.
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MN, USA
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Posted: 4/19/2024 11:22:21 AM EDT
[#12]
Quote HistoryOriginally Posted By criley: Thanks! Will tackle that soon. Best of luck, let us know how it goes?!? Someone else might find this of use 
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Posted: 4/24/2024 11:59:37 AM EDT
[#13]
I was able to heat it and bend it. Raised it to within just a hair of the top of the channel, it was already in line horizontally. Ejection improved, but still problematic. I may need to file the tip since lifting it changed the angle a bit.
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Posted: 4/30/2024 1:36:11 AM EDT
[#14]
Well, I heated up again and raised it a little more, and then filed the tip.
Ran almost 200 rds through with zero problems and thought I had it licked. Then I put one more mag in wanting to go past the 200 rd mark. Had one shell get caught between the bolt and ejection port. Then I ran a couple more mags with no problems. So, one failure to eject out of 230 or so rounds. Tremendous improvement but I want 100%. Maybe it was a fluke. Will keep running it to see how it goes. |
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MI, USA
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Posted: 4/30/2024 11:52:02 AM EDT
[#15]
The language of this thread can't help but remind me:
https://www.youtube.com/watch?v=SdXHW0DJEEU |
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TX, USA
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Posted: 5/21/2024 5:28:39 PM EDT
[#16]
Quote HistoryOriginally Posted By s4s4u: So all you want is something that is soft enough to bend and yet hard enough to withstand the constant beating of a steel/brass case at 1000FPS? LMK? All of the Fraurem adapters use soft steel ejectors and they easily last thousands of rounds, especially in the AR9 products. Ejectors do not need to be hardened if they are designed right (*). Now of course some are a little more challenging. Ruger PC has an ejector that is extremely thin and long, which can deform very easily. But generally speaking making ejectors of 316 stainless works very well in 9mm. In fact even A1006 works, because the layer of soot prevents rust. (*) Small print: this assumes typical bolt velocities that we have today. An ejector for Luger needs to be hardened. In addition, ejectors of GPMGs have long enough life expectancy they you want them hardened. |
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TX, USA
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Posted: 5/21/2024 5:32:55 PM EDT
[#17]
Originally Posted By criley: I have a Spike's Glock 9mm lower and need to tune the ejector to a BRN-9 upper. Broke one trying to bend it upward to get close to the top of the channel. I didn't heat it the first try - if I heat the replacement ejector will I be able to raise it? Are there other ejectors out there that aren't hardened that I can bend? If the base is compatible, I'd start with Stern https://getstern.com/mag-ad-ejector-replacement-kit/ However, it's not that difficult to manufacture one's own. You can use a suitable welding sheet from Ace Hardware. I did that years ago when I started making AR9 adapters. If you're not good with your hands, drill, and hand saw, you might want to order a laser cut pattern from OSHcut or SendCutSend. The minimum order is about $40. You only need a simple package to make a DXF. An open source tool such as OpenSCAD works for that. |
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Posted: 5/22/2024 1:43:53 AM EDT
[#18]
Thanks for the added info.
Happy to say I've run a couple hundred more rounds through with no problems. So I had one FTE in about 430-450 rds. Hope that one was just a fluke thing. |
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Posted: 5/22/2024 3:36:45 AM EDT
[Last Edit: Blowback9]
[#19]
Quote HistoryOriginally Posted By criley: Thanks for the added info. Happy to say I've run a couple hundred more rounds through with no problems. So I had one FTE in about 430-450 rds. Hope that one was just a fluke thing. Could have been the powder charge in that one round. Normally I'd suggest slowing the action down just a little with a heavier buffer or lighter spring, but with the BRN-9, we're stuck with the proprietary reciprocrating mass and spring. Wish I could help further, but I'm glad the heating/bending worked out as expected! Hopefully it just needed a little break-in period. |
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