Sig Question

It's absolutely terrible that the airman lost his life with this and may he rest in peace

It's probably been brought up in other threads but I'm following now, how this plays out with the military contract

Got ya.

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Local Ranges - at least here on the Northshore - are banning them from being used as well as not renting them out and going as far as not to sell them if they have a retail shop. Our Rangemaster spoke with 3 indoor ranges from from Ponchatoula to Slidell and 1 has banned them, one has stopped renting them and put restrictions on drawing from a holster, and the other is keeping an eye on them closely but haven't put any rules in place because of the # of LEO's that use their range and the P320 is their duty gun.

We have banned them from Honey Island Shooting Range until further notice.

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And so it begins

Not a gunsmith, but from what I understand the 320 the 365 are not the same design. The 320 has “fire control unit” that is supposed to marry up with components in the slide. The failures are probably from poor machine tolerances that cause those parts to not engage properly. Lots of videos of guys barely manipulating the trigger while tapping on the slide and… pow.

This does not surprise me. SIG has too many things going on from pistols, rifles, optics, suppressors, ammo, etc. What other firearms manufacturer has so many products in the market. They came on pretty strong the last 10 years or so. They tried to break into the long range/hunting market with the SIG Cross with many terrible reviews. They should have focused on doing one or two things well instead of trying to capture all segments of the firearms industry.

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Not a gunsmith, but from what I understand the 320 the 365 are not the same design. The 320 has “fire control unit” that is supposed to marry up with components in the slide.

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is that what makes it "modular"?

I did a little reading on it after seeing that recent death of the airman. From what I gathered the trigger unit in the P320 has stamped metal part in the unit and the P365 is totally machined, in my mind I’m thinking that makes it more stout and durable while the stamped metal may be causing issues some kind of way. Idk just my uneducated guess.

I own a P365x and love it


I looked up the difference between the two FCU and found this link. Post #22 gives a detailed breakdown.

https://www.sigtalk.com/threads/is-the-p365-design-mechanically-different-than-the-p320.431986/?u=202864

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The 320 uses a different slide lock lever layout and a coil spring held in by a horizontal lateral pin where the 365 uses a wire like spring in the FCU chassis and the takedown lever arm to hold the slide lock lever in place and give it spring tension. The disconnector is in slightly different location on each and a different size and shape; same with the firing pin safety lever that pushes up on the firing pin safety plunger in the slide. The 320 FCU has a separate housing for the sear assembly whereas the 365 sear fits into the FCU chassis directly. The 320 FCU goes into the grip module then the take down lever is pushed through a hole in the grip module and FCU; the 365 has the take down lever in place in the FCU and the whole assembly is placed in the grip module as a complete unit. The P320 FCU is stamped sheet metal and the 365 FCU is a casting which is then finish machined The ejector on the P320 is just a bent over part of the stamped steel, the ejector on the P365 is part of the machined component.

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So in all of that, what's the issue?

Just learning the acronyms

Fire Control Unit (FCU)


The FCU is the component (frame) that houses a majority of the key functional parts of some handguns; including parts such as the trigger, sear, and slide catch lever; and is the serialized part of the firearm. With the SIG SAUER P320 or P365 modular handguns, the FCU can be easily removed from the grip module and swapped out with a variety of grips, barrels, and slides to create a firearm suited specifically to the shooter and intended use of the handgun.

Most AK47's are made from stamped sheet metal. It isn't concerning.

I think the root of the problem is that the 320 is really a single action pistol. The striker is fully cocked so only two things need to happen for it to go off, disengage the sear and trigger block. With most other striker fired pistols, the striker is only half cocked and the trigger pull cocks it, disengages the striker block and drops the sear.

Assuming there is an issue of course. Im not convinced yet.

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does your slide have as much slop as the guy in the video I posted in the other thread?

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The slop goes away with a loaded magazine in it. My P365s have a lot of slop as well. The M18 was appropriated by my wife. She’s a little sad that I don’t want her shooting it for the time being so now I have to replace it with something else.

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She’s a little sad that I don’t want her shooting it for the time being so now I have to replace it with something else.

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Check out the beretta apx line. I have had a couple and really love them. They shoot great and work well for a smaller hand.