What's the word on the sd aluminum trigger? Is it going to be an easy install or will it require a gunsmith? Any idea when it will be released? THANKS

I got the Apex spring kit today and immediately replaced the striker spring. Just that made quite a difference - cut the weight by at least a third and the break is much crisper and less hard, if you know what I mean. I'm wondering if the trigger return spring and plunger spring replacements are even necessary? How much of a difference will they really make?

Shot my SD 9mm that I had installed the Apex spring kit in yesterday at an IDPA match. Put about 130 round through the pistol.

I experienced two Light Strike on the second from last stage. I think they may have been due to my being tried as it was a rather Hot day (80*) and a long day as well as there were 115 shooter at the match.

I suppect I did not have a strong grip on the pistol as I did not have any other issue on the remaining string of fire on that stage or the next stage.

I will shot again at next month match as see if their are any issue before getting to concerned.

Cavegeo,

Please keep me up to date on the situation. I've been shooting my SD's with as heavy of primers as I can find and haven't had any light strikes yet, but that doesn't mean it's impossible.

What ammo are you using? If reloads, what primers, how deep are they seated and how does the crimp look?

Thanks.

Scott @ Apex

OOPS, I totally missed your post with this question.

The Trigger return spring will reduce the pull weight by more than a pound in most cases. The Striker Block Spring will help to reduce or eliminate the "double click" in the reset. If you're not feeling a double click, You could consider omitting that spring.

Scott @ Apex

Scott

I was using my own reloads, I use CCI small pistol primers.

I seat my primers with a Lee Auto Prime, the older style. I seat them firmly but don't measure them.

I use brass that I pickup from the range usually Winchester or Remington but can run into any and all manufactures.

I use Lee Crimp Die on all my reloads, I tend to use a heavy crimp.

I collected the rounds and will take a look at them and will see if I can get some photos of them this evening.

I don't have an account to load the photo up. Sorry.

Sounds like the Apex spring kit is a must do for my SD9. The aluminum trigger will also be a must have. Any ideas on price?

Great stuff here in the forums!

Ed

I just installed the spring kit in my SD9. The trigger pull went from 8 1/4# to just 5 3/4#. Not too bad. I'll have to give a better review of it after I shoot the gun and retest the trigger pull.

I do have a couple questions for anyone who wants to answer them. In the video he filled the trigger return spring up with white lithium grease. Just for lubrication? Do I have to relube it down the road?

At 10:25 in the video, he mentions the sear engagement on sear housing block can be polished on both the bottom and the back edge. After I reassmebled the gun and I was looking at how it worked, and it seemed to me that the trigger bar pushed on the front edge of the sear engagement and not the back. Any idea on why the rear is getting polished but not the front?

And one suggestion that I do have it the slave pin that was included in the kit quickly wore the finish off of my trigger pin when I was trying to wiggle everything out. Now I have a nice shiny pin on the side of my gun instead of a black end. Not that big of a deal but if I had to do it over again I would use a q-tip or a wooden down instead of the included pin. I think a quick smear of a sharpie will take care of the problem.

We're not absolutely certain on the Al. triggers just yet, but will let you know as soon as we have that info available. We're also going to be working on a polymer trigger for the M&P that will be somewhat like our Al. trigger, the idea will be to provide you with a more wallet friendly trigger option for the M&P and the SD.

Scott @ Apex

We fill the springs with grease for 2 reasons, the first is to dampen vibrations. The viscosity of the grease will dampen the shock wave that flows through the spring, it may seem like nothing, but it's kind of a habit of ours here in the shop. If you visualize how the spring reacts under recoil, it's going to be at full stretch and bounce up and down pretty hard while the gun fires and the action cycles. We're estimating that the trigger return spring gets more than 100 G's under recoil. So the grease is to help dampen the shock to the spring. We have absolutely no conclusive evidence that the grease helps, but it sure makes us feel better about it.


Actually what I should have said was polish all 3 sides. The polishing will help smooth out the trigger pull and reset if you get the front, back and bottom.

The slave pin for this kit is likely to be changed in the near future, I'm sorry that it rubbed off a bit on your trigger pin. I've had good luck using oil on a cleaning patch to remove the aluminum rub off.

Scott @ Apex

I finally installed one of the two SD spring kits I ordered (I was the OP for this thread!). I now have one SD that is fully modified and the other that has only the Apex striker spring (lazy - I know - the trigger return spring will go in soon).

I'll be at the range tomorrow night, shooting a variety of 40 S&W rounds, including Speer factory and handloaded with CCI and Federal primers. My only concern is primer strikes with the lighter striker spring -- proof of concept tomorrow night!

Yes, I would like to hear from another reloader how there reload fair, I was experiencing to many light strikes.

I just got my sd9 spring kit in the mail today and I'm planning on installing it and heading to the range tomorrow. I'll probably use grease in the trigger return spring for the time being, however I've read that it tends to accumulate debris over time and make things feel a little gritty. So I was wondering if I could trim down/ replace the felt that lined the original spring for use with the new one. (I'm assumng the felt was there to absorb shock and it seems like replacing it would be a more permanent solution than using grease). This is only my second gun and it will be my first time breaking a gun down farther than is neccessary for cleaning, so any thoughts/ information would be appreciated. I can't wait to get it out on the range tomorrow!

I installed the kit today, it was a piece of cake (except for removing the trigger pivot pin the first time, that took as long as everything else combined) and i finished it in just over half an hour. I accidentaly bought red lithium grease instead of white so I'll forgo the grease today at the range and look into grease/felt for next time.
I shoot all factory loads so I won't be able to comment on reloaded primer issues but I'll be sure to post if there's any trouble with what I do shoot.
Off to the range!

As it's getting nicer out and I'm shooting a little more I wanted to hear word about a possible trigger for the SD from Apex. I emailed them and here is their response:

The new Triggers that will be coming out will be intended for our M&P AEK kit line up will could be out within the next 2 few weeks to few months.
Any kind of SD triggers are a ways out we cant confirm any kind of details or time frames on it at this time.

Which sounds code to me meaning they were put on the back burner and they may not get resurrected. *Sigh*

Any new news on the sigma kit?