1911: hammer falls when slide is released on an empty chamber

[chemo]

Mega issue discovered tonight on my STI spartan...
when dropping the slide on an empty chamber, the hammer falls sometimes in semi-cocked, sometimes falls completely

off the top of your head, which part should I be switching to correct that?

hammer, sear and disconnector are still sharp. About 4000 rounds down the pipe since the Armco trigger job (I'm second owner, warranty expired long ago, and no I'm not sending back the gun to him).
picture will follow

 

[colinjw]

IMO, the sear is either slipping off the hammer hook or is not fully engaging in the first place. I would replace the 3 finger spring & also check that the trigger is not binding and not returning to the forward position properly all the time.

 

[Wolfstrack]

sear + hammer, somebody done a trigger job and maybe polished the hammer hook too much....check how much sear engage hammer

 

[chemo]

I would replace the 3 finger spring & also check that the trigger is not binding and not returning to the forward position properly all the time.

it was exactly that. New sear spring= no more problem
very good sear to hammer engagement

look how sharp everything still is:

 

[mlehtovaara]

Lots of people try to lighten the trigger by just bending that sring, and results in issues like yours.

Probably less of an issue with a loaded gun, but still not the right way to go about a trigger job.

 

[chemo]

Yeah, I remember I bent that spring because it was catching mags, nothing to do with trigger job. I replaced it a couple weeks later along with a MSH/magwell combo. I recently put back the previous MSH and tought oh well, might aswell put the sear spring that was with it too

what a bad idea.

 

[Wolfstrack]

that's good news...yr hammer and sear looks very good

 

[RED CAT]

Hammer Fall!

Dropping the slide on an empty chamber is not good idea on a 1911. It will ruin a good trigger job in a hurry. Why would you do it?

 

[deadman]

Dropping the slide on an empty chamber is not good idea on a 1911. It will ruin a good trigger job in a hurry. Why would you do it?

Isn't that considered to be part of the standard safety check of a 1911s function? In this case I'd say it was a good thing. Just my opinion.

 

[tjhaile]

Isn't that considered to be part of the standard safety check of a 1911s function? In this case I'd say it was a good thing. Just my opinion.

Correct. Letting the slide slam forward on an empty gun repeatedly will needlessly accelerate hammer/sear wear, but once or twice for safety check purposes is acceptable. The gun is not safe if the hammer follows when the slide is dropped on an empty gun.

 

[animalamidon]

Good to hear you are not having any more trouble after installing new spring. Hammer fall can be scary ####!