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| What frame are you using? |
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| Is the barrel end of your guide rod a complete circle or 2 half circles? If half circles the round end goes on the barrel not the flat flat end. |
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| The 320 has had many issues, I would dump it. If not, send it to Sig or Greyguns. |
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Prepared for the Worst, Providing the Best
| quote: Originally posted by sg: The 320 has had many issues, I would dump it. If not, send it to Sig or Greyguns. OP, if you remove the fcu from the gun, and push down on the disconnector, does it move up and down with a little resistance? Pushing down on it should move the trigger bar down as well, then the spring should push them back up when you release the finger pressure on the disconnector. It shouldn't take a bunch of force to depress the disconnector...just light finger pressure. If they're not moving freely, I'd start with the spring...remove that and see if the parts now travel freely. If they do, it could be the spring is bent, improperly installed, or one of the legs is out of shape and binding against something. If they don't, you may have a bent disconnector or maybe some foreign object (shard of brass, dirt, etc) has made it's way into the disconnector channel and is binding up the works. It's hard to troubleshoot without actually having it in hand...but that's where I would start. Has this been a problem since day 1 with this FCU, or did it develop at a later time? If so, what were the conditions that led up to the problem? |
| Posts: 9552 | Location: In the Cornfields | Registered: May 25, 2006 |
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| quote: Originally posted by sg: The 320 has had many issues, I would dump it. If not, send it to Sig or Greyguns.
What do you mean by "dump it"? Just move on from the platform altogether? What do you know of the OP's situation and his ability to even consider such an action? What evidence do you have of these "many issues", their frequency, severity, etc? These are the kinds of replies that nobody is looking for. "Your gun is trash, you should get rid of it or send it to XYZ company to make right." This is a new member asking, too, and he's in California, which poses its own challenges. |
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| Thank you so much, for taking the time to try and troubleshoot this for me!
I really do like the platform and I have no desire to get rid of it. Out of dozens of flavors of sidearms, my 320 comes in second only to my 229 as to the perfect form and fit for my hand. It shoots really well and I love its modularity and its light weight. I can raise the gun with my eyes closed, and it still has a perfect sight alignment for me.
And I appreciate your understanding of my residing here in the Great State of Confusion... the P320 isn't on the short DOJ list of firearms that are allowed to be sold by FFL's, so I had to find a police officer that had purchased one and then part with $1600 to buy his used gun from him. (They usually run about $2000 here) So, I am clueless as to its previous life.
With the FCU removed from the grip, the disconnector can be pushed down in its channel with about seven pounds of pressure. It only pops back up maybe once in seven or eight tries. With the trigger bar spring removed, the disconnector floats freely within its channel.
Moving the trigger through its take-up, the rear of the trigger bar no longer rides on the face of seer-housing and the disconnector then pops back up with each press. Perhaps the housing or trigger bar has a rough surface. I have a replacement seer housing group coming from Sig that I plan to swap in, and I'll try stoning the current housing and trigger bar in the interim.
Thanks again, for your help with this! |
| Posts: 7 | Location: NorCal, CA | Registered: July 22, 2021 |
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Peace through superior firepower
| quote: Originally posted by sg: The 320 has had many issues, I would dump it.
Tell me that this is advice you would take from a stranger on the internet. Go ahead. Tell me. |
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| I’m not fully picturing the issue. The disconnector should ride up in the relief cuts made on the underside of the slide. When it’s sitting up in the cut, it is disengaged. When the slide moves rearward, it pushes the disconnector down. That action should disconnect the trigger from the trigger bar and/or sear. I’m actually not familiar with how they accomplish the disconnect within the FCU, so that part may be incorrect. To make sure we’re talking the same stuff, the disconnector is the bird-head looking thing sticking up out of the FCU, right? Are you locking the slide to the rear prior to turning the takedown lever?
------------------------------------------------ Charter member of the vast, right-wing conspiracy
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Prepared for the Worst, Providing the Best
| quote: With the FCU removed from the grip, the disconnector can be pushed down in its channel with about seven pounds of pressure. It only pops back up maybe once in seven or eight tries.
This is concerning. It shouldn't take anywhere near that much pressure, and it should pop back up immediately with the spring installed. This and the fact that it floats freely without the spring makes me suspect either a problem with the spring or that the spring is improperly installed. Any chance you could take some photos of the spring installed on the gun, and of it removed? |
| Posts: 9552 | Location: In the Cornfields | Registered: May 25, 2006 |
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| Posts: 7 | Location: NorCal, CA | Registered: July 22, 2021 |
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| quote: Originally posted by BuddyChryst:
To make sure we’re talking the same stuff, the disconnector is the bird-head looking thing sticking up out of the FCU, right?
Are you locking the slide to the rear prior to turning the takedown lever?
Correct, the 'bird-head' disconnector is being resistant to being depressed, requiring about 7 lbs of pressure to depress the trigger bar, which prohibits the slide from being removed from the grip/FCU. And yes, the slide is being locked to the rear prior to turning the takedown lever. Thanks again, for your help... |
| Posts: 7 | Location: NorCal, CA | Registered: July 22, 2021 |
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| I may have missed it, but your FCU and your slide have both been through the "upgrade," or were recent enough purchases that both have the "upgrade milling and parts?
I believe you said you're mixing and matching. Does the slide have the upgrade cut? |
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