Need help about apex trigger install

[ussoldier1984]

I purchased the apex FSS trigger kit and I was wondering what the small yellow and the blue spring are for??? I watched the videos on the install on apex website but they do not mention anything about these two springs. Please help.

 

[missiondude]

I have not done a FSS from Apex, but I have done plenty of their sears. Are the springs the same size as your stock sear spring under the plunger? I think they give you a couple different sear springs in that kit to tune it to your liking.

 

[ATF]

The blue spring is for a RAM they say you should change your RAM spring to this one when you install an APEX kit but I don't know why. I left my original RAM spring in because I only read about this later. Someone tell me if they know

There is no yellow spring that's a slave pin for installing the trigger, it used to be metal. The green spring is the heavier trigger spring and the silver one lighter. Trust me use the silver one. Then you have the sear spring and the USB spring you can't mix them up

https://store.apextactical.com/WebDirect/Products/Details/191816

 

[ussoldier1984]

I used the 4lb silver spring. the actual color is more brass and its smaller than the ram spring. It was not the striker spring already did that. Even in the videos from apex they did not mention these two springs. hmmm. How much pre travel do you have? so far its a lot less then stock with mine but I was hoping it would be less then what I am getting

 

[ATF]

I used the 4lb silver spring. the actual color is more brass and its smaller than the ram spring. It was not the striker spring already did that. Even in the videos from apex they did not mention these two springs. hmmm. How much pre travel do you have? so far its a lot less then stock with mine but I was hoping it would be less then what I am getting

You may have got an older kit that included a 1/16" sear spring for the older striker block. My setup has virtually zero travel and reset. Did you install an FSS or DCAEK kit with an APEX trigger?

 

[ussoldier1984]

I have the latest FSS kit from apex and it came with the aluminum trigger. as of right now I have 1/16 of an inch till I hit the breaking point. is that about what you get????? post travel is great on it.

 

[ATF]

I have the latest FSS kit from apex and it came with the aluminum trigger. as of right now I have 1/16 of an inch till I hit the breaking point. is that about what you get????? post travel is great on it.

I suppose it's about that, hardly anything. You can adjust it with the trigger bar but I wouldn't bother 1/16" is fine. Regarding your brass colored spring is it 1/16"? Just curious.

 

[ussoldier1984]

No that spring larger diameter then 1/16 I thing I will play with my trigger bar a bit to close it in more. but not until I go to the range. Gotta say though the new trigger fss from apex kicks some serious butt compared to the factory trigger. I can't wait until tomorrow to test it out on the range!!!

 

[ATF]

Are you sure you changed the sear spring? If you ordered the FSS kit and trigger separately you would have got an extra sear spring. Which would is 1/8" diameter.

 

[ussoldier1984]

yes positive I changed the sear spring. well I hope I did lol this is my first handgun that is not a 1911 so I am more than willing to take advice. Hand me a 1911 and I know it very well, so If I am correct the two different lb springs 5 and 4 lbs are the sear springs correct???

 

[ussoldier1984]

in the apex fss kit the two sear springs are silver and green right???

 

[ATF]

The 5lb and 4lb springs are the trigger springs they are on the right of the pic. Then you have the USB spring which is next to the USB (Ultimate Striker Block) left side of pic. The sear spring is the one above the silver trigger spring. The sear spring fits under the sear which is pictured far left. Blue spring RAM spring if you decide to install a RAM (Reset Assist Mechanism).

 

[ussoldier1984]

wow that was not in the videos and instructions I researched. you willing to skype or chat on something so i can get more info???

 

[ATF]

1. Remove rear sight so you can change the USB and install it with the APEX USB spring. Careful you don't lose the little black spring cap for the USB spring. That's what the black tool is for to keep it in place when removing and replacing the rear sight.
2. Remove the striker block housing and remove the sear. There's a mushroom shaped cap under the sear with a spring. Remove this cap and replace the spring with the APEX sear spring then refit the cap and replace the stock sear with the APEX sear.
3. Install either of the trigger springs together with the APEX trigger making sure the open end of the spring loop faces up.

 

[ussoldier1984]

I did all that already, Its late so I misread the last message from you. the yellow spring is an oem... I just had a brain fart lol. The only spring I did not replace is the ram. Some how I got confused. sorry dude.

 

[ATF]

If the stock spring is used it can result in random sear flutter (about once every 20 rounds fired for me). This happened to me when i left the stock spring in and was resolved by using the blue spring. People that have the 9mm version do not report this. Mine is in 40 S&W and it did result in sear flutter. Symptom is the sear literally flutters under recoil and does not engage the striker resulting in FTF. Sear flutter did not present during dry firing and as I said happened about once every 20 rounds. Mileage may vary etc.

Thanks for the info. I didn't realize the RAM spring could create sear flutter. My M&P is 9mm BTW

 

[retiree]

If the stock spring is used it can result in random sear flutter (about once every 20 rounds fired for me). This happened to me when i left the stock spring in and was resolved by using the blue spring. People that have the 9mm version do not report this. Mine is in 40 S&W and it did result in sear flutter. Symptom is the sear literally flutters under recoil and does not engage the striker resulting in FTF. Sear flutter did not present during dry firing and as I said happened about once every 20 rounds. Mileage may vary etc.

Did you really mean the blue RAM spring or the stock sear spring? I've heard that the stock sear spring when used with the Apex sear can result in flutter but not the RAM.

 

[retiree]

Oh wait, I get it. If you do not change your existing RAM spring for the new blue RAM spring it may introduce flutter even after you have installed the Apex sear spring. Correct?

 

[Raised on a Deere]

Sear flutter?

If the stock spring is used it can result in random sear flutter (about once every 20 rounds fired for me). This happened to me when i left the stock spring in and was resolved by using the blue spring. People that have the 9mm version do not report this. Mine is in 40 S&W and it did result in sear flutter. Symptom is the sear literally flutters under recoil and does not engage the striker resulting in FTF. Sear flutter did not present during dry firing and as I said happened about once every 20 rounds. Mileage may vary etc.

FTF? What are the words? I think by sear flutter you are describing a condition whereby You get a second firing from one trigger pull. I am newbie with pistols.
Reason I am interested is on my new M&P 40 Pro I had an incident where after a particular shot the trigger was so light I just touched it and the gun fired. That has me worried. In the mean time I clear the gun before laying it down or Holstering it.

 

[ussoldier1984]

Sorry I do not know a lot of the guts of this style pistol give me a 1911 and I am good to go but anyway uhhh where is my ram on my sear block. Here is a pic