Posted: 5/25/2025 11:26:11 PM EDT
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He dropped the video today. For you SIG P320 guys just be aware of the possible problem. This makes sense on the holster pops. This absolutely could create a random condition which cannot be repeated unless you know what to look for. The video is 24 minutes long. You get the gist of it in the first 10 minutes. No games, no name calling, this is about keeping people safe at this point. @ Youtubers please make a video to share this far and wide. People need to know!  Modified SIG P320 Comparison and Drop Test. ?? |
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I don't think it's that simple, but it may be a contributing factor. The whole design is overly complicated and dependent on outsourced slurry based machined parts that may have QC issues, not to mention a company that has a reputation of updating specs and parts without informing anyone, leaving prior purchasers in a lurch, run by a CEO who has already demonstrated his willingness to skirt laws he deems inconvenient and who has already ruined the reputation of another company through shitty QC. There's no reason to buy a 320 when there are a dozen other options that won't make you involuntarily transgender, or a cripple, or dead. |
shame really because they feel fantastic in the hand.
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Quoted: He dropped the video today. For you SIG P320 guys just be aware of the possible problem. This makes sense on the holster pops.  https://www.youtube.com/watch?v=utGmYit8YZAAnd we saw in a previous video the striker block not working in one example when manually tripping the sear. Put those two issues together and yea you could definitely have a gun go off unintentionally. |
| A couple of things to remember are uniformed officers are having the bulk of issues with the 320 negligent discharges. Officers are given a transition class or taught in the academy about this issue when reassembling the weapon. If they are assembling the weapon without using the slide lock, they are doing it contrary to how they were trained. It was mentioned that the sear could have out of spec or outsourced parts. The discharge issue has been going on since 2017 across all generations of P320 upgrades with pre and post upgrade weapons before any India manufactured parts were involved. |
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Quoted: Sorry OP im tired of watching 50 min videos because they can't summarize my content down to a few minutes. If the guy found the issue he should be able to write an executive summary on it. But essentially when reassembling the pistol the takedown lever lifts the sear into a half way position that the striker can just barely hold on to. |
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I think that the guy has figured either the issue, or three of the issues out. Not operating the slide stop after disassembly could easily happen, and that makes it unsafe on even a stock gun. Mindblowingly bad design. The fact that the magazine lip sheet metal is the only thing that keeps a mag out of it is also bad. So if the takedown lever, magazine feed lip, or magazine release is a fraction of an millimeter out of spec, the gun is unsafe. |
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Quoted: A couple of things to remember are uniformed officers are having the bulk of issues with the 320 negligent discharges. Officers are given a transition class or taught in the academy about this issue when reassembling the weapon. If they are assembling the weapon without using the slide lock, they are doing it contrary to how they were trained. It was mentioned that the sear could have out of spec or outsourced parts. The discharge issue has been going on since 2017 across all generations of P320 upgrades with pre and post upgrade weapons before any India manufactured parts were involved. I've reassembled plenty of pistols the "incorrect" way like in that video. Before this I've never heard of a pistol that needed to lift the slide stop to fully engage the sear. |
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Quoted: And yet I can see it being easily overlooked or not followed especially if they were never told why it needs to be done that way. I've reassembled plenty of pistols the "incorrect" way like in that video. Before this I've never heard of a pistol that needed to lift the slide stop to fully engage the sear. This is very important. Neither have I and I wouldnt have done it. |
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Quoted: I think that the guy has figured either the issue, or three of the issues out. Not operating the slide stop after disassembly could easily happen, and that makes it unsafe on even a stock gun. Mindblowingly bad design. The fact that the magazine lip sheet metal is the only thing that keeps a mag out of it is also bad. So if the takedown lever, magazine feed lip, or magazine release is a fraction of an millimeter out of spec, the gun is unsafe. Also the whole "you do this on a glock" is for the initial removal of the slide on a glock. I've never seen anyone do the same thing upon reassembly. They pull the slide all the way back at least one or two times. |
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More than enough people have shot themselves in the leg to justify the term "Glock Leg" I won't own one More than enough videos have been shown that a Sig P320 can discharge in a holster with the person's hand being clearly away from the pistol. I won't own one. Many pistols have been less than 100% reliable. I won't own one I trust HK pistols and classic German designed metal framed Sigs I could trust FNs, CZs etc but most guns go ahead and make your excuses my life wants 100% in function both when I need rounds going out and damn sure does not have rounds coming in from my own pistol If I woke up and saw a new video of a P320 sitting on a nite stand going off all by itself I would think, not a surprised, not in the least |
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Quoted: Ok so they dont operate the slide stop after disassembly. What happens when they go to load the pistol? Also the whole "you do this on a glock" is for the initial removal of the slide on a glock. I've never seen anyone do the same thing upon reassembly. They pull the slide all the way back at least one or two times. Quoted: Quoted: I think that the guy has figured either the issue, or three of the issues out. Not operating the slide stop after disassembly could easily happen, and that makes it unsafe on even a stock gun. Mindblowingly bad design. The fact that the magazine lip sheet metal is the only thing that keeps a mag out of it is also bad. So if the takedown lever, magazine feed lip, or magazine release is a fraction of an millimeter out of spec, the gun is unsafe. Also the whole "you do this on a glock" is for the initial removal of the slide on a glock. I've never seen anyone do the same thing upon reassembly. They pull the slide all the way back at least one or two times. If i understand correctly, you can pull the slide back as many times as you like and the sear stays halfway up on some early designs. Seems the fix is applied to newer guns where it stays down until the stop is actuated. I have an early P320 VTac. I need to test it. |
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Quoted: Ok so they dont operate the slide stop after disassembly. What happens when they go to load the pistol? Also the whole "you do this on a glock" is for the initial removal of the slide on a glock. I've never seen anyone do the same thing upon reassembly. They pull the slide all the way back at least one or two times. I don't think you're understanding what's going on. You must push the slide stop up to fully reset the sear on a P320. Racking the slide a hundred times won't do it. And I'm certain you're aware that you don't need to actuate the slide stop in order to load an empty gun. |
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Quoted: I don't think you're understanding what's going on. You must push the slide stop up to fully reset the sear on a P320. Racking the slide a hundred times won't do it. And I'm certain you're aware that you don't need to actuate the slide stop in order to load an empty gun. When do you have to push the slide stop all the way up? Is this for normal operation or if you assmeble it awkwardly? |
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TLDW summary: The P320 was poorly engineered and susceptible to dangerous malfunctions if not assembled in a very specific way, and with parts tolerances that may be out of spec coming from the manufacturer. In other words, it’s a piece of shit but it has a nice trigger. |
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So not using the slide lock during re-assembly will allow the slide to be put back on but the magazine block will still be engaged so a mag can't be inserted even when the gun is in a condition to allow trigger pull and striker release. 5:00 he re-assembled without using the slide stop and could not insert a magazine. He lifts the slide lock at 5:55 and you hear a click. But, aren't all the guns going off by themselves ones that have a magazine inserted? |
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Quoted: Yes I watched the first 10 and skimmed the rest. Is he implying you also need an out of spec magazine or slide stop for this to occur? We do know that some 9mm 320s have shipped with 10/45 takedown levers which allow an in-spec mag to insert completely. So wrong part + incorrect assembly + non functioning striker block + torque or impact events = ??? |
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Quoted: i have never reassembled the 320 and had a dead trigger. what on earth Probably because you're reassembling it correctly, the way most people are. I learned to lock back the slide on Berettas and SIGs decades ago. It's habit. The problem with the 320 design is it allows you to reassemble the gun incorrectly- something that hasn't been acceptable in handgun design for fifty years. |
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Quoted: Yes I watched the first 10 and skimmed the rest. Is he implying you also need an out of spec magazine or slide stop for this to occur? I could also easily see someone cursing at it, then giving it a solid whack, seated. Or it would be a slightly out of spec mag or the little thing that blocks the mag could be out of spec, or some combination of both and a solid whack to seat it. Like most failures it's probably a combination of a lot of little things that all line up leading to a failure. |
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Quoted: So not using the slide lock during re-assembly will allow the slide to be put back on but the magazine block will still be engaged so a mag can't be inserted even when the gun is in a condition to allow trigger pull and striker release. 5:00 he re-assembled without using the slide stop and could not insert a magazine. He lifts the slide lock at 5:55 and you hear a click. But, aren't all the guns going off by themselves ones that have a magazine inserted? |
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Quoted: I don't think it's that simple, but it may be a contributing factor. The whole design is overly complicated and dependent on outsourced slurry based machined parts that may have QC issues, not to mention a company that has a reputation of updating specs and parts without informing anyone, leaving prior purchasers in a lurch, run by a CEO who has already demonstrated his willingness to skirt laws he deems inconvenient and who has already ruined the reputation of another company through shitty QC. There's no reason to buy a 320 when there are a dozen other options that won't make you involuntarily transgender, or a cripple, or dead.  |
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Quoted: A couple of things to remember are uniformed officers are having the bulk of issues with the 320 negligent discharges. Officers are given a transition class or taught in the academy about this issue when reassembling the weapon. If they are assembling the weapon without using the slide lock, they are doing it contrary to how they were trained. It was mentioned that the sear could have out of spec or outsourced parts. The discharge issue has been going on since 2017 across all generations of P320 upgrades with pre and post upgrade weapons before any India manufactured parts were involved. |
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Quoted: I don't think it's that simple, but it may be a contributing factor. The whole design is overly complicated and dependent on outsourced slurry based machined parts that may have QC issues, not to mention a company that has a reputation of updating specs and parts without informing anyone, leaving prior purchasers in a lurch, run by a CEO who has already demonstrated his willingness to skirt laws he deems inconvenient and who has already ruined the reputation of another company through shitty QC. There's no reason to buy a 320 when there are a dozen other options that won't make you involuntarily transgender, or a cripple, or dead. I agree 100%. But that video as shown would create a very random condition. SIG needs to stop using watch makers to design their guns. |
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Quoted: Watching. Reserving judgment, as I'm no armorer. I own a P320. I've met people who trust them, and those that don't. I won't gift it to any of my children unless they're familiar with the uncommanded discharge controversy. Good man. Very smart. Hopefully someone figures this out. |
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Quoted: Sorry OP im tired of watching 50 min videos because they can't summarize my content down to a few minutes. If the guy found the issue he should be able to write an executive summary on it. The people posting the videos should give a summary, it seems like common decency instead of posting click bait guessing games. ETA- I appreciate the people who watched the full video and were able to give a couple line summary. If this guy figured it out, we all know that Sig figured it out a long time ago and doesn’t want to recall all the guns for new parts. By doing so it would show they were aware of the issues, and accepted the known consequences. At some point someone from Sig will get fired, and they will leak the info out of spite. |
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Quoted: So if the takedown lever, magazine feed lip, or magazine release is a fraction of a millimeter out of spec, the gun is unsafe. In a gun design that requires increased tolerance stacking to maintain its modularity. And all for what? How many P320 owners are regularly swapping their frames out. Maybe .05%? |
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Quoted: In a gun design that requires increased tolerance stacking to maintain its modularity. And all for what? How many P320 owners are regularly swapping their frames out. Maybe .05%? If even that. Modular systems seem like a way for companies to invite the aftermarket crowd, as well as the mfg to make more money. |
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Super interesting. I know ALOT of cops. A vast majority are just provided new guns and never trained on them. Most agencies have used glocks since the early 90’s so many people would be doing it without lifting the slide stop. Even if the spec was decent. I can see a bunch of cops just ramming the mag home till it seats. If this is what’s going on I still do not feel like it absolves sig but it may make it more safer if reassembled correctly? Idk Ron at the helm, shitty qc parts, etc still don’t k ow if I trust it. I would really have liked to see him put that primed cartridge in the M17 and drop it/beat it to see if it would go POW! Also what modification did he do that prevented seat engagement 100% until you lift the slide stop. I have a p320 and might want to do that to mine. Thanks for the vid OP. |
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Interesting. I just tried this with my P320 .45 and my 9mm. On both, the sear drops out of sight and they have a dead trigger until I push up the slide stop. Didn't know they did that. Just looked at the serial numbers again. The .45 has a 58A prefix. It is an early gun that I sent back for the voluntary recall. The 9mm has a 58J prefix. I bought that FCU last year. ETA: Other than putting a flat trigger in the 9mm, both FCUs are unmodified. |
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Quoted: Super interesting. I know ALOT of cops. A vast majority are just provided new guns and never trained on them. Most agencies have used glocks since the early 90’s so many people would be doing it without lifting the slide stop. Even if the spec was decent. I can see a bunch of cops just ramming the mag home till it seats. If this is what’s going on I still do not feel like it absolves sig but it may make it more safer if reassembled correctly? Idk Ron at the helm, shitty qc parts, etc still don’t k ow if I trust it. I would really have liked to see him put that primed cartridge in the M17 and drop it/beat it to see if it would go POW! Also what modification did he do that prevented seat engagement 100% until you lift the slide stop. I have a p320 and might want to do that to mine. Thanks for the vid OP. The Loudoun County Sheriff’s Office, never issued Glocks. Their duty weapon prior to the Sig was a HK Usp in .40. |
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Quoted: I don't think it's that simple, but it may be a contributing factor. The whole design is overly complicated and dependent on outsourced slurry based machined parts that may have QC issues, not to mention a company that has a reputation of updating specs and parts without informing anyone, leaving prior purchasers in a lurch, run by a CEO who has already demonstrated his willingness to skirt laws he deems inconvenient and who has already ruined the reputation of another company through shitty QC. There's no reason to buy a 320 when there are a dozen other options that won't make you involuntarily transgender, or a cripple, or dead. To me, that's the root of this entire issue. When I first built/assembled a P320, I was stunned at how unnecessarily complicated the trigger/FCU group was. We have over 100 years of semi-automatic handgun design history that has already demonstrated numerous reliable way to design this kind of thing - and SIG-Sauer decided to re-invent the wheel for no compelling reason.  I like the P320, but if there really IS a serious problem with the design, it it 100% something that SIG-Sauer unnecessarily did to themselves. |
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Quoted: In a gun design that requires increased tolerance stacking to maintain its modularity. And all for what? How many P320 owners are regularly swapping their frames out. Maybe .05%? Quoted: Quoted: So if the takedown lever, magazine feed lip, or magazine release is a fraction of a millimeter out of spec, the gun is unsafe. In a gun design that requires increased tolerance stacking to maintain its modularity. And all for what? How many P320 owners are regularly swapping their frames out. Maybe .05%? Thats really the thing, modularity isn't really that big of a selling point nor that useful. If it comes at the cost of safety, it’s a non starter. |
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Quoted: I would just get one with a manual safety. I've retaught myself the 1911. It is truly not that hard to swipe the safety on draw. How glock taught a generation to fear manual safeties on a single action pistol is pure marketing. ETA: There is no THE problem. There's a host of problems that are all magnified by a lack of QC. |
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Quoted: I wonder how strong it is too. I could also easily see someone cursing at it, then giving it a solid whack, seated. Or it would be a slightly out of spec mag or the little thing that blocks the mag could be out of spec, or some combination of both and a solid whack to seat it. Like most failures it's probably a combination of a lot of little things that all line up leading to a failure. Yeah, and I bet after a few of those solid whacks, the marginally in spec parts get beaten further out of spec and mag insertion gets easier, further hiding the problem and making it easier to field the gun in an unsafe condition. |