An Update From Apex On The FN 509 Trigger

Where is the FN trigger? And why is it taking so long?

We’ve had a ton of questions lately about the status of our Flat-Faced Action Enhancement Trigger for the FN 509. We initially started work on this trigger – for the FNS – back in 2014 and quickly discovered that there were several obstacles to overcome in order for us to deliver a drop-in trigger kit that end users could install themselves.

At that time we stepped back from the platform, and had it not been for requests from a close friend, who at the time worked for FN, we would have left it on the drawing board and never really addressed the project again.

Fast forward to early 2016. It was at this time that our friend asked us to please revisit the FNS line of pistols. Since I hold this friend in such high regard, I sat down with Apex’s CEO (and my co-owner) Randy Lee to discuss the idea of resurrecting the project and he agreed that we should give it another look.

Developing a drop-in trigger for the FNS, and now the FN 509, requires extensive design in order to overcome three significant issues. These can be considered exceptional design challenges, especially considering no other trigger maker is taking on development of a replacement trigger kit for the FN pistol.

Here are the three issues we’re tackling, which hopefully helps explain the delay in releasing the new trigger.

Issue #1

The most difficult aspect of a new trigger kit for the FNS/FN 509 model pistols is replacing the factory trigger bar with a new trigger bar design.

When we first looked at the FNS pistol back in 2014, we were concerned about the factory trigger bar being double bent into a U-shape at the point of contact with the trigger. The concern we had was friction during installation of the trigger body and the potential to collapse the U-Shape. Sure enough, when installing the factory trigger bars onto our first prototype triggers we crushed four trigger bars. Knowing that the end user would be installing the trigger bar themselves, this was an unworkable option.

It was at this point that we realized we had to come up with a trigger bar re-design. This set us on a path of studying the system to truly understand the differences between machined parts and stamped parts and the forces involved in each.

We spent months going back and forth with our chosen stamping shop discussing materials and design elements to make the best trigger bar possible. After many samples and alterations to the stamps, we finally settled on the design, material, manufacturing technique and finish.

Once the design was finalized we started the patent process which took quite a bit of time as well. We were successful in filing for and receiving Patent Pending status on our trigger bar design.

Issue #2

While the trigger body design was relatively easy, when compared to that of the trigger bar, mid-way through design and testing of our trigger we learned that FN was going to release the FN 509. We realized that the FN 509 would be the company’s new flagship pistol and we needed to wait until we could get our hands on the FN 509 to confirm that our trigger would work in it as well as the FNS.

The FN 509 required us to make some changes to our own trigger body design, and though easy, those took time to get dialed in – particularly in conjunction with an evolving trigger bar design.

Issue #3

The third issue we faced was the sear. Initially we did not plan to incorporate the sear into the trigger kit, but instead develop it after release of the trigger as an additional upgrade item.

The factory sear is a great component, but we felt that a few changes would make it even better. And as our timing got pushed back it made much more sense to accelerate sear design and development to offer it in a full upgrade kit with the trigger and trigger bar.

The new Apex sear design for the FN 509 reduces the trigger pull weight. This, of course, meant we needed to adjust the trigger’s design accordingly. Additionally, the sear is also a stamped piece, and as we are having to work with an outside stamping company the process takes longer than that for a machined sear like those we manufacture in-house for the M&P line of pistols.

So, where does that leave us?

As of right now, the trigger, trigger bar and sear are all on their way to Apex as final, preproduction prototypes. We will begin our testing protocol in the next couple of weeks, and provided there are no additional alterations required, we should be good to go and start in on full production of the new trigger kit.

As usual, we will announce the release dates of our products in due course.

~ Scott Folk, COO of Apex

paul / October 27, 2017 / Apex News
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  1. Phill - March 19, 2018 @ 10:41 pm

    Can’t wait for this!

  2. Scott ward - March 21, 2018 @ 4:42 pm

    Can’t wait. This is gonna be awesome

  3. Scott - March 25, 2018 @ 9:33 am

    Thanks for continuing to update this with comments occasionally. The 509 is an excellent underrated handgun that needs more dedicated aftermarket support. A better trigger will probably put this ergonomic firearm at the top of my favorites. Looking forward to buying this upgrade.

  4. Kyle - March 25, 2018 @ 1:02 pm

    Can’t wait!

  5. Jeff - March 26, 2018 @ 3:51 pm

    Anxiously waiting. Any updates? Will you post your release announcement to this feed?

  6. EC - March 27, 2018 @ 8:47 am

    I saw your IG post… Color me excited!!!

  7. paul - March 27, 2018 @ 8:53 am

    No updates at the moment. We will post new news here, on our Facebook page, Instagram and in our weekly email newsletter.

  8. paul - March 27, 2018 @ 8:56 am

    We will have a kit for the FN 509 and one for the FNS.

  9. paul - March 27, 2018 @ 8:57 am

    Yes, compatible. Nothing on pricing yet.

  10. Matt - March 30, 2018 @ 9:34 pm

    Any chance either kit will be compatible with the FNP models?

  11. spencer - April 7, 2018 @ 2:30 pm

    I’m glad you are still working on this. Please let people who get your emails know as well. Some of us despise FB, even before this latest brouhaha.

  12. Jacob - April 11, 2018 @ 1:10 pm

    Please get this going. The fns and 509 are awesome and are growing in popularity. If you guys get this right you’ll have the market cornered for the only aftermarket trigger sold.

  13. Jeff - April 13, 2018 @ 1:04 pm

    Are you going to release the new triggers for the FNS and 509? Been waiting for several months now. Will they be available for sale by the summer of 2018?

  14. Brian Green - April 13, 2018 @ 6:40 pm

    Looking forward to the new trigger

  15. Jason - April 15, 2018 @ 9:44 pm

    Any updates? Also would like to verify compatibility with FNS9 compact

  16. Jon - April 20, 2018 @ 8:43 pm

    I’m so excited… Watching because I have two FNs that need triggers

  17. Paul - April 27, 2018 @ 7:04 pm

    Cannot wait for this!!!

  18. Kip - April 28, 2018 @ 6:12 pm

    Will the FNS trigger assembly work for the FNS-9C?

  19. Glenn - May 1, 2018 @ 10:22 am

    There is definitely a trigger in the works for the FNS too? Awesome guns but the factory trigger is very “Fisher Price-like” But I’ll hold onto it if there is hope on the horizon.

  20. Shayne - May 4, 2018 @ 3:54 pm

    any updates?

  21. Ryan - May 7, 2018 @ 11:23 am

    I just seen that the trigger along with the thin blue line package will be released this summer. Any idea on price and what will the thin blue line package consist of?

  22. shayne - May 7, 2018 @ 12:35 pm

    Any updates?!

  23. Jeff - May 13, 2018 @ 5:19 pm

    Please advise on the status.

  24. paul - May 16, 2018 @ 9:04 am

    The price will be the same as that of the regular trigger kit. We have not announced the final release date or the MSRP. Once that is locked in we’ll announce publicly.

  25. paul - May 16, 2018 @ 9:05 am

    For the FNS-9c you would run the kit for the FN 509.

  26. paul - May 16, 2018 @ 9:07 am

    The FNS-9c would take the FN 509 kit.

  27. Keith - May 18, 2018 @ 5:21 pm

    Any update on this?

  28. J Cano - June 12, 2018 @ 11:13 pm

    You guys are awesome, I love your products and level of dedication. I can’t wait to put one of these masterpieces into my FNS 9c.

  29. paul - June 25, 2018 @ 8:00 am

    No, not yet.

  30. paul - June 25, 2018 @ 8:04 am

    Not at all.

  31. Jon L - June 26, 2018 @ 2:39 pm

    Going to hold off purchasing the 509 until I know for sure the trigger is released. I have APEX triggers in virtually all my guns and love them!

  32. Tony Z - July 2, 2018 @ 7:13 pm

    Looking forward a trigger for the FNS 9mm longslide that I really like. Hoefully we will see a flat trigger for my FNX 45 Tactical as well.

  33. Kyle - July 8, 2018 @ 3:32 pm

    I can’t wait!!!

  34. Brandon Taitano - July 10, 2018 @ 4:27 pm

    Is there something in the works for the FN45T pistols? Seems like a huge amount of us would be willing to grab these up.

  35. David - July 15, 2018 @ 1:38 pm

    I have a FNS9, FNS9c, and a FNSL all waiting for these triggers, I agree with getting it right the first time, so I am waiting as everyone else is. Is there a rough estimate at least when production will start?

  36. paul - July 16, 2018 @ 9:06 am

    No, we have nothing for the FN45T pistol.

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