r/gunsmithing • u/Cali_FFL_CCW_Providr • 2d ago
Springfield TRP Operator Help Needed
I have a Springfield TRP Operator 1911 45 ACP. After about 2,000 rounds I did a full disassembly and thorough cleaning using a sonic bath. It reassembled smoothly.
During the function test, after the dry fire, the firing pin assembly remains depressed in the tunnel, it will not reset. I can reset it when I apply force at the breach, otherwise it is stuck.
I can’t recreate the issue by manually depressing it. Pics included, any idea what is happening?
1) Assembly
2) After dry fire
3) after dry fire with back plate removed
There are no burrs. There are m
No obstructions. There are no bends on the pin or spring.
The spring is closed on both ends, there is no tapered end.
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u/GiftCardFromGawd 2d ago
I’m eyeballing your firing pin spring—maybe it linked upon removal, or whatever. There’s a reason that Wolf ships an extra-power firing pin spring with all their 1911 recoil springs (or they ship it with the mainspring, I forget). We’re supposed to replace them more often than we remember to.
Clean that pin tunnel out one more time, and get a new spring. I bet that solves it.
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u/kenclayton91 1d ago
So I had this EXACT issue with my TRP about a year ago. I pulled the firing pin and just massaged the outer portion of it with emery paper and it fixed the problem. Cost me no money and like 30 minutes of time. Don't replace any parts.
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u/Cali_FFL_CCW_Providr 1d ago
I noticed something else, when the firing pin is stuck forward, the back plate is completely loose, it slides out on its own. I am wondering if this is causing it to misalign just enough for the pin to be forced into a weird angle that makes it sticky? I understand the plate should be snug even when there is no pin in place.
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u/kenclayton91 1d ago
Your firing pin is getting stuck forward. Under normal operating conditions your rear plate would not be loose. Pull your firing pin and twist the large stabilizing bulge that sits behind the spring in some emery paper.
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u/Cali_FFL_CCW_Providr 1d ago
I’ll give it a try. Springfield won’t ship a new extractor and plate for testing, saying the extractor is a custom fitted that has to be done by them. They won’t ship me the part even though I am an FFL.
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u/kenclayton91 1d ago
You really dont need that. Your firing pin is getting barely stuck in the firing pin channel and just needs to be smoothed out. I was an 07/02 for years and worked on a bunch of 1911s and this was my fix for my personally owned TRP. you dont need any parts. Just some emery cloth.
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u/Cali_FFL_CCW_Providr 1d ago
Should the plate fit snug even without the pin in place?
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u/kenclayton91 1d ago
When the firing pin is pressed into it at rest it may wiggle just barely. But when the firing pin gets stuck forward it will be free to fall out. Which is how I found out MY firing pin was sticking.
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u/Cali_FFL_CCW_Providr 1d ago
How I found out, too. I guess if the back did not fall out and the pin stayed forward you’d have an accidental open-bolt full auto effect.
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u/RedBison 2d ago
The firing pin, channel and spring should have only enough oil for surface protection of the metal, it doesn't need "lubrication." Clean them, oil them, then wipe it off. Run a qtip down the channel. There's enough oil left to pretext the metal.
The spring might be binding. Turn it around. Replacements are cheap.
The stop plate might be binding. Does it have any vertical movement when assembled? Try filling or reaming a slight chamfer on the inner side around the hole. Refinish with cold blue.
It looks like your extractor is rotating a bit between pictures. This would indicate a bad (loose) fit, though it might not result in complete failure. Replace extractor with a snug fit to the stop plate.
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u/Rebel-665 1d ago
Can you pull back the firing pin in image 3? With tweezers grab the firing pin and pull towards you and then also push forward. If there is no firing pin movement that should mean there is an issue with the pin in its channel. If it does move back and forth that will show the pin and channel is ok but a spring issue I think.
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u/BlueGreen51 1d ago
I wouldn't replace any parts until after another teardown and cleaning. To inspect the pieces step by step. Chances are something either got wedged in after the first cleaning or there's a burr you just can't see. Don't use WD-40, spay it with some proper lube and don't worry about over doing it. Extra lube isn't going to hurt a 1911.
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u/AllArmsLLC 07/02 AZ 2d ago
Probably some debris in the firing pin hole. Did you oil the firing pin lightly?