No, not sleeping one off. The media describes the sig 320 as “cocked at rest” meaning the striker is not half was cocked but ready to fire. Thus, people are claiming the basis for the discharges complained of. The glock, i think, is half cocked and pulling the trigger fully cocks and releases? Is that right? My question, though, pertains to the sig 365, which is my often carry. Is it fully cocked when a round is placed into the chamber by working the slide backwards. Anyone hear of similar claims with that gun.
Cocked at rest?
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Lola1
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There have been no claims, to my knowledge, of a P365 discharging in the way that they claim the P320 is discharging.
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851 Posts
Take the slide off the frame.
Now get a caliper and measure the distance from where the back of the slide sits on the frame to the back of the cruciform with the trigger fully forward (at rest).
Place a primed, unloaded case in the chamber.
Transfer the measurement to the upside down, locked in a vise, slide. Cock the striker to that distance.
Depress the firing pin safety.
Let go of the striker.
No bang.
There, you just did your own test, no need to speculate, research or quote someone else's test.
Rest easy.
I do.
My EDC is also a P365. The way I look at it is there has been over a million sold since it's introduction. If there was a problem, I believe we would we would have heard about it by now. Think about how much we heard about the broken striker, or striker drag in the early days. This gun, as popular as it is, going off by itself would have been really big news.
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8,176 Posts
The P320 is a bit spooky with Army special features and a not-exactly-a-recall recall, and various anecdotes.
The P365 seems not to have been troubled by such stuff.
The P365 seems not to have been troubled by such stuff.
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1,836 Posts
I examined the sear interface* on an M&P 2.0. the firing pin side is marked "10°". The overall engagement surface length is about 1/10". The sear return spring is not strong enough to reset the sear if the sear is engaging the striker interface*, but the mechanical advantage is such that it is darned near impossible to "prep the trigger". And even if the trigger was "prepped", I don't how the firing pin plunger safety could be disengaged without pulling the trigger.
After playing with and examining the sear interface* I've decided that the M&P 2.0 is plenty safe for me.
* Too lazy to look up the correct terminology
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7,757 Posts
Spooky with Army special features ?
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Spooky = reports of drop firing.
Army special features = included to prevent drop firing.
Non- recall = add drop fire prevention to commercial guns.
As seen on the internet, doesn't make it right, but there are people not trusting of the P320.
Army special features = included to prevent drop firing.
Non- recall = add drop fire prevention to commercial guns.
As seen on the internet, doesn't make it right, but there are people not trusting of the P320.
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6,728 Posts
My sample size of one has been good to go. I don’t have any concerns about the design.
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Doggone it, I'm gonna request a refund from the university! Robert Hooke was a fraud!
But in all seriousness, you are 100% correct. There are limits to the application of Hooke's law (and the linear relationship). But I'll bet if you asked 10 engineers, 9 of them will believe Hooke's law has no limits.
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12,666 Posts
I tend to agree. I did some research and brought one just last week. Fired all of 200 rounds. This is a major topic on all the gun boards. I’m thinking a lot of the failures might be people who won’t own up to an ND.
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365 failures? I guess I’ve not heard about those. I’ve seen the flailing and churning about the 320, but not anything reliable about the 365 having troubles. There are millions of them out there. Of course I tend to avoid the YouTube and this is the only gun board I look at.
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16,794 Posts
I know. I'm a ME with a PE license. Lots of what they taught us in school is theory. The good engineer figures that out real quick.
Most coil springs start out pretty linear, but through use become progressive. Leaf springs are usually progressive. The SIG spring at issue is a very thin spring, a hybrid with two leaf and one coil sections. Both Glock springs related to the striker (block and actual striker) are equal equal coil length coil springs.
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356 Posts
The media as usual is wrong. The Sig is not totally cocked.
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21,594 Posts
Assuming drop safeties are defeated, seems like the real issue is relationship between energy delivered to primer from half-cock vs. energy needed to ignite primer. And to learn that, you need to do something along the lines of Post 24.
My limited, unscientific experience with coil springs in actual use is that they become progressive pretty quickly toward the extremes. So measurements from in-service springs are as important as nominal/initial numbers.
My limited, unscientific experience with coil springs in actual use is that they become progressive pretty quickly toward the extremes. So measurements from in-service springs are as important as nominal/initial numbers.
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12,666 Posts
I was agreeing to the two posts to my question. I don’t see an issue with the p365, if I had it to do over I would still buy one.
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17,257 Posts
This discussion about whether it is full or partial cock, is missing the mark. The issue is the "event" when the sear falls off without intention. If that happens, and how that occurs.
Whether there's redundant or sufficient mechanism to stop impact on the primer,
Whether there's redundant or sufficient mechanism to stop impact on the primer,
Glocks have been considered double action only resulting in a slightly harder trigger press, but accepted by LE reqiring double action only. Some others prelode firing springs so have lighter trigger press. But at what cost? An old issue. Not new.
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