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Return to “Sig P320 un-commanded discharges”
- Sun Dec 11, 2022 12:10 am
- Forum: General Gun, Shooting & Equipment Discussion
- Topic: Sig P320 un-commanded discharges
- Replies: 51
- Views: 89624
Re: Sig P320 un-commanded discharges
Getting the spring off is not the issue. Getting it back on is the issue. With the new FCU (gold trigger) I don’t see how it can be put back on unless you have three hands.
- Fri Dec 09, 2022 12:23 pm
- Forum: General Gun, Shooting & Equipment Discussion
- Topic: Sig P320 un-commanded discharges
- Replies: 51
- Views: 89624
Re: Sig P320 un-commanded discharges
I own several, one I sent in for the upgrade and one came with the upgrade. They had an issue with a trigger shoe that was heavy by weight, and if smacked hard enough at the rear of the gun the trigger and trigger bar would move backward enough to discharge the weapon. They went to a light weight trigger and a modification to the slide, and offered to upgrade any that were already purchased. However, more could have been done in my opinion. Did all of the 320s involved have the upgrade?
What is not clear in these incidences is whether the trigger and trigger bar are somehow being moved, or is the striker shoe slipping off the sear. Is the sear not fully resetting, after initially charging up the gun and grabbing only a tiny bit of the striker shoe and then working loose from daily activities?
One of the issues I have seen with my 320s if I fully disassemble them is that it is damn near impossible to reassemble it with damaging the trigger return spring and causing a light trigger return. If weak enough I would think the sear may not fully reset and grab enough of the trigger shoe. Unlike a Glock and like the Springfield XD/XDM models, the striker is fully compressed (cocked) in the Sig 320 series. I always have to take a pair of needle nose pliers and re-bend the trigger return spring to get satisfactory trigger return pressure after reassembly. My thought is that this trigger return spring may be part of the issue, and certainly Sig could have done a better job in that area. There are also stronger trigger return springs on the market.
I don’t own a 320 version with a thumb safety like the military models so I don’t know if it blocks the trigger, blocks the striker, or if not fully reset, would the thumb safety refuse to move into the safe position? Perhaps someone here knows the answer to that.
In my opinion Sig could have included a grip safety that blocks the striker and that may help, as would a trigger safety like a Glock, but if the fully compressed striker is slipping off the sear because the trigger is not fully reset, I am not sure it would solve the problem – if that were the problem.
I know some people hate grip safeties, but I have owned many guns with them and they have never been an issue – and are very useful when holstering
What is not clear in these incidences is whether the trigger and trigger bar are somehow being moved, or is the striker shoe slipping off the sear. Is the sear not fully resetting, after initially charging up the gun and grabbing only a tiny bit of the striker shoe and then working loose from daily activities?
One of the issues I have seen with my 320s if I fully disassemble them is that it is damn near impossible to reassemble it with damaging the trigger return spring and causing a light trigger return. If weak enough I would think the sear may not fully reset and grab enough of the trigger shoe. Unlike a Glock and like the Springfield XD/XDM models, the striker is fully compressed (cocked) in the Sig 320 series. I always have to take a pair of needle nose pliers and re-bend the trigger return spring to get satisfactory trigger return pressure after reassembly. My thought is that this trigger return spring may be part of the issue, and certainly Sig could have done a better job in that area. There are also stronger trigger return springs on the market.
I don’t own a 320 version with a thumb safety like the military models so I don’t know if it blocks the trigger, blocks the striker, or if not fully reset, would the thumb safety refuse to move into the safe position? Perhaps someone here knows the answer to that.
In my opinion Sig could have included a grip safety that blocks the striker and that may help, as would a trigger safety like a Glock, but if the fully compressed striker is slipping off the sear because the trigger is not fully reset, I am not sure it would solve the problem – if that were the problem.
I know some people hate grip safeties, but I have owned many guns with them and they have never been an issue – and are very useful when holstering