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  • Labeled FN 509 Trigger Spring Kit M*CARBO
  • FN 509 Trigger Spring Kit Contents
  • FN 509 Trigger Upgrade Kit M*CARBO
Labeled FN 509 Trigger Spring Kit M*CARBO

FN 509 Trigger Spring Kit

review-star review-star review-star review-star review-star
(4.82) 136 reviews
Price: $19.95
in-stock-product Availability: IN STOCK

Retail: $24.95

You Save: $5.00(20.0%)


Quantity:
pledge
Product Information

About This Item

  • Reduce your trigger pull from 7.25lbs to a modified 4.25lbs (Average results can vary up to +/- 1lb)
  • Improve accuracy and overall FN 509 Performance
  • Solid 40% Trigger Pull Reduction!
  • Custom FN 509 Aftermarket Trigger Upgrade!
  • Also functions in 509C, 509C Tactical, and FNS Models!
  • Will NOT function in FNX Models.
  • Highest Quality American Spring Steel ASTM A228 Music Wire
  • FN 509 Trigger Kit includes a Custom Lighter Sear Spring, Disconnector Spring, Striker Spring and Striker Block Spring
  • Protected by the M*CARBO 100% Lifetime Guarantee
  • Made in the USA!
  • Fast Same Day Shipping!
Description

FN 509 Trigger Spring Kit Includes:

  • Custom Lighter Sear Spring
  • Custom Lighter Disconnector Spring
  • Custom Lighter Striker Spring
  • Custom Lighter Striker Block Spring

Custom FN 509 Trigger Job to reduce trigger pull from a factory 7.25lbs to a modified 4.25lbs, giving you a 40% FN 509 Trigger Pull Reduction! Best FN 509 Trigger Upgrade for Increased Performance. Lighter and Smoother FN 509 Trigger Pull and Improved FN 509 Trigger Reset. Custom FN 509 Accessories by Combat Veterans! Best FN 509 Aftermarket Parts to get the Most Performance out of your FN 509 Pistol! 

The FN 509 Trigger Mod is a must have for FN 509 Aftermarket Trigger Upgrades! Improved Accuracy with Custom FN 509 Trigger Upgrade designed by Combat Veterans! Best way to improve the FN 509 Trigger with Custom FN 509 Trigger Spring Kit by M*CARBO! Corrects Problems with Factory FN 509 Trigger.

Custom FN 509 Trigger Upgrade to Improve Performance and Accuracy! If you have ideas for more FN 509 Accessories send us an email! help@mcarbo.com

Best FN 509 Upgrades for Competition Level Performance!

FN 509 Owners Manual & Exploded View:

If you're getting the FN 509 Trigger Spring Kit, then you might find the following FN 509 Resources useful in further enhancing your firearm. Download the FN 509 Owners Manual to plan your next firearm project.

M*CARBO No Hassle 100% Lifetime Guarantee:

The FN 509 Trigger Spring Kit is protected by the M*CARBO No Hassle 100% Lifetime Guarantee.

No Hassle 100% Lifetime Guarantee Ribbon


Drop Tested and Approved:

FN 509 Trigger Spring Kit is built with M*CARBO ASTM Spec Springs that will offer a perfect trigger pull reduction with an unlimited drop test rating (3", 6", 9" & 12"+).

Drop Tested and Approved Icon


Tested and Approved:

The FN 509 Trigger Spring Kit has been tested repeatedly with numerous brands of ammunition to ensure reliable operation and safety.

Product Tested and Approved Sticker


Veteran Owned and Operated Business:

American made FN 509 Trigger Spring Kit designed and manufactured by Combat Veterans. We will donate a portion of your purchase to the Military Foundations we humbly support.

Veteran Owned Business Ribbon


ATTENTION:

You must be 18 yrs of age to purchase. We advise that all parts purchased from our inventory be installed and inspected by a qualified gunsmith. Modifying your weapon may be prohibited in your state. Do not modify your sear or hammer engagement surfaces, with or without the FN 509 Trigger Spring Kit. Before installing please be sure to check all local state and federal laws. By installing this part you agree to take full responsibility for any and all legal, health and warranty consequences that may be incurred.

Reviews
509 spring kit
review-star review-star review-star review-star review-star
This kit combined with the Apex trigger makes my 509 feel like butter..
Thanks M*CARBO!
review image  
509 spring kit
review-star review-star review-star review-star review-star
This kit combined with the Apex trigger makes my 509 feel like butter..
Thanks M*CARBO!
review image  
Nice improvement!
review-star review-star review-star review-star review-star
This creates a great improvement in the trigger pull! Based on prior experience with light strikes using a different brand, I won’t even try the striker spring, however, I would estimate a 1-1.5lb trigger reduction using the other components. This is perfect IMO. Also, the safety takedown isn’t much different, but keep an eye on the tiny ball in the detent.
509 trigger kit works
review-star review-star review-star review-star review-star
Simple install, just follow along with the video.
Great results, 7.5# down to 4.5#
Great customer service!
Thanks gentlemen.
FN 509 Spring Kit
review-star review-star review-star review-star review-star
This kit reduced the trigger pull around 2lbs. I wish I could buy a new trigger from Mcarbo.
Not Much Difference
review-star review-star review-star review-star review-star
Great video made the install easy. Unfortunately, did not see much of a difference. Also having jamming issues, even using different ammo. Will most likely re-install the original springs.
Spring kit
review-star review-star review-star review-star review-star
Quick easy install.
509 Spring Kit
review-star review-star review-star review-star review-star
I've installed 2 kits with greatly improved pull regarding smoothness and reduction in weight. Over many months, I have checked the pull on all of the stock 509's my gun dealer has had in stock. Almost all never vary in the gritty, lousy feel from FN. One of the sales reps behind the counter packs a 509, and after trying mine, asked if I would install the kit on his gun. He's really impressed with the difference the kit made compared to what he had compared to stock. I will add that in addition to the spring kit, several further steps will help in smoothness. I wrapped a punch with 3000 grit paper and smoothed out the striker channel for any tiny burrs that might be present, polished the face of the striker until mirror smooth, and probably the most important part was polishing the firing pin block and lever that pushes the block in. I start with Mothers and continue with higher grits up to 10,000 with the Dremel and polishing bit. The top of most blocks have a disgusting cast area that should be removed until it is smooth as possible. Take a look at the block where the lever slides and you'll see it. I also polish the new striker spring that rides in the channel. Also be sure to do what Chris advises in his video and put some grease behind the trigger where it slides touching the frame. These combined steps should drastically improve your 509 or any other variant.
Questions & Answers
0 0
Question:
Does this trigger spring kit function with my FN Five-Seven? If not, do you offer one for it?
December 2, 2021 5:47 PM
0 0
Question:
Any reason this would not work with an Apex Tactical FN509 trigger? Thanks!
November 19, 2021 4:17 AM
0 0
Question:
I have been using this and have been pleased w/ the performance. I recently upgraded to the Apex Tactical performance trigger which includes a new sear. It feels that the strike seems weaker. Should I put back all of the OEM springs back or perhaps just the sear spring?
October 18, 2021 2:11 PM
Answers
Thank you for contacting us, I believe the issue is with the APEX striker combined with our striker spring. If you would like to maintain the APEX striker I would swap back to the Factory striker spring, or you can swap back to the factory striker and maintain our spring. The difference in weight between the two strikers combined with the lighter striker spring can lead to light strikes, especially with reloaded or steel cased/surplus ammo.
Answered by
/ December 16, 2021 11:58 AM
0 0
Question:
If I bought this kit for the 509/c/t and only installed, let’s say just the striker firing pin spring and striker block spring to start? Would I see any potential benefits? Less grit? Less drag?
Loadedmike October 2, 2021 7:33 PM
Answers
Hey Brother, You will definitely see a reduction although we cannot give you a definitive amount. In regards to the smoothness and drag. So long as you polish some of the parts, you'll be good to go!
Answered by
Matt@mcarbo.com74555 / October 5, 2021 11:09 AM
0 0
Question:
Will this function in the FN 509 LS Edge?
DaddyFixIt September 25, 2021 12:45 AM
Answers
Hello, our FN 509 kit is compatible with all FN 509 models, including the LS Edge.
Answered by
Crystal@MCARBO.com / September 29, 2021 9:30 AM

About This Item

  • Reduce your trigger pull from 7.25lbs to a modified 4.25lbs (Average results can vary up to +/- 1lb)
  • Improve accuracy and overall FN 509 Performance
  • Solid 40% Trigger Pull Reduction!
  • Custom FN 509 Aftermarket Trigger Upgrade!
  • Also functions in 509C, 509C Tactical, and FNS Models!
  • Will NOT function in FNX Models.
  • Highest Quality American Spring Steel ASTM A228 Music Wire
  • FN 509 Trigger Kit includes a Custom Lighter Sear Spring, Disconnector Spring, Striker Spring and Striker Block Spring
  • Protected by the M*CARBO 100% Lifetime Guarantee
  • Made in the USA!
  • Fast Same Day Shipping!

FN 509 Trigger Spring Kit Includes:

  • Custom Lighter Sear Spring
  • Custom Lighter Disconnector Spring
  • Custom Lighter Striker Spring
  • Custom Lighter Striker Block Spring

Custom FN 509 Trigger Job to reduce trigger pull from a factory 7.25lbs to a modified 4.25lbs, giving you a 40% FN 509 Trigger Pull Reduction! Best FN 509 Trigger Upgrade for Increased Performance. Lighter and Smoother FN 509 Trigger Pull and Improved FN 509 Trigger Reset. Custom FN 509 Accessories by Combat Veterans! Best FN 509 Aftermarket Parts to get the Most Performance out of your FN 509 Pistol! 

The FN 509 Trigger Mod is a must have for FN 509 Aftermarket Trigger Upgrades! Improved Accuracy with Custom FN 509 Trigger Upgrade designed by Combat Veterans! Best way to improve the FN 509 Trigger with Custom FN 509 Trigger Spring Kit by M*CARBO! Corrects Problems with Factory FN 509 Trigger.

Custom FN 509 Trigger Upgrade to Improve Performance and Accuracy! If you have ideas for more FN 509 Accessories send us an email! help@mcarbo.com

Best FN 509 Upgrades for Competition Level Performance!

FN 509 Owners Manual & Exploded View:

If you're getting the FN 509 Trigger Spring Kit, then you might find the following FN 509 Resources useful in further enhancing your firearm. Download the FN 509 Owners Manual to plan your next firearm project.

M*CARBO No Hassle 100% Lifetime Guarantee:

The FN 509 Trigger Spring Kit is protected by the M*CARBO No Hassle 100% Lifetime Guarantee.

No Hassle 100% Lifetime Guarantee Ribbon


Drop Tested and Approved:

FN 509 Trigger Spring Kit is built with M*CARBO ASTM Spec Springs that will offer a perfect trigger pull reduction with an unlimited drop test rating (3", 6", 9" & 12"+).

Drop Tested and Approved Icon


Tested and Approved:

The FN 509 Trigger Spring Kit has been tested repeatedly with numerous brands of ammunition to ensure reliable operation and safety.

Product Tested and Approved Sticker


Veteran Owned and Operated Business:

American made FN 509 Trigger Spring Kit designed and manufactured by Combat Veterans. We will donate a portion of your purchase to the Military Foundations we humbly support.

Veteran Owned Business Ribbon


ATTENTION:

You must be 18 yrs of age to purchase. We advise that all parts purchased from our inventory be installed and inspected by a qualified gunsmith. Modifying your weapon may be prohibited in your state. Do not modify your sear or hammer engagement surfaces, with or without the FN 509 Trigger Spring Kit. Before installing please be sure to check all local state and federal laws. By installing this part you agree to take full responsibility for any and all legal, health and warranty consequences that may be incurred.

Product Reviews (136)
review-star review-star review-star review-star review-star
4.82
509 spring kit
review-star review-star review-star review-star review-star
This kit combined with the Apex trigger makes my 509 feel like butter..
Thanks M*CARBO!
review image  
509 spring kit
review-star review-star review-star review-star review-star
This kit combined with the Apex trigger makes my 509 feel like butter..
Thanks M*CARBO!
review image  
Nice improvement!
review-star review-star review-star review-star review-star
This creates a great improvement in the trigger pull! Based on prior experience with light strikes using a different brand, I won’t even try the striker spring, however, I would estimate a 1-1.5lb trigger reduction using the other components. This is perfect IMO. Also, the safety takedown isn’t much different, but keep an eye on the tiny ball in the detent.
509 trigger kit works
review-star review-star review-star review-star review-star
Simple install, just follow along with the video.
Great results, 7.5# down to 4.5#
Great customer service!
Thanks gentlemen.
FN 509 Spring Kit
review-star review-star review-star review-star review-star
This kit reduced the trigger pull around 2lbs. I wish I could buy a new trigger from Mcarbo.
Not Much Difference
review-star review-star review-star review-star review-star
Great video made the install easy. Unfortunately, did not see much of a difference. Also having jamming issues, even using different ammo. Will most likely re-install the original springs.
Spring kit
review-star review-star review-star review-star review-star
Quick easy install.
509 Spring Kit
review-star review-star review-star review-star review-star
I've installed 2 kits with greatly improved pull regarding smoothness and reduction in weight. Over many months, I have checked the pull on all of the stock 509's my gun dealer has had in stock. Almost all never vary in the gritty, lousy feel from FN. One of the sales reps behind the counter packs a 509, and after trying mine, asked if I would install the kit on his gun. He's really impressed with the difference the kit made compared to what he had compared to stock. I will add that in addition to the spring kit, several further steps will help in smoothness. I wrapped a punch with 3000 grit paper and smoothed out the striker channel for any tiny burrs that might be present, polished the face of the striker until mirror smooth, and probably the most important part was polishing the firing pin block and lever that pushes the block in. I start with Mothers and continue with higher grits up to 10,000 with the Dremel and polishing bit. The top of most blocks have a disgusting cast area that should be removed until it is smooth as possible. Take a look at the block where the lever slides and you'll see it. I also polish the new striker spring that rides in the channel. Also be sure to do what Chris advises in his video and put some grease behind the trigger where it slides touching the frame. These combined steps should drastically improve your 509 or any other variant.

Questions & Answers

5 Questions

0 0
Question:
Does this trigger spring kit function with my FN Five-Seven? If not, do you offer one for it?
December 2, 2021 5:47 PM
0 0
Question:
Any reason this would not work with an Apex Tactical FN509 trigger? Thanks!
November 19, 2021 4:17 AM
0 0
Question:
I have been using this and have been pleased w/ the performance. I recently upgraded to the Apex Tactical performance trigger which includes a new sear. It feels that the strike seems weaker. Should I put back all of the OEM springs back or perhaps just the sear spring?
October 18, 2021 2:11 PM
Answers
0 0
Thank you for contacting us, I believe the issue is with the APEX striker combined with our striker spring. If you would like to maintain the APEX striker I would swap back to the Factory striker spring, or you can swap back to the factory striker and maintain our spring. The difference in weight between the two strikers combined with the lighter striker spring can lead to light strikes, especially with reloaded or steel cased/surplus ammo.
Answered by
/ December 16, 2021 11:58 AM
0 0
Question:
If I bought this kit for the 509/c/t and only installed, let’s say just the striker firing pin spring and striker block spring to start? Would I see any potential benefits? Less grit? Less drag?
Loadedmike October 2, 2021 7:33 PM
Answers
0 0
Hey Brother, You will definitely see a reduction although we cannot give you a definitive amount. In regards to the smoothness and drag. So long as you polish some of the parts, you'll be good to go!
Answered by
Matt@mcarbo.com74555 / October 5, 2021 11:09 AM
0 0
Question:
Will this function in the FN 509 LS Edge?
DaddyFixIt September 25, 2021 12:45 AM
Answers
0 0
Hello, our FN 509 kit is compatible with all FN 509 models, including the LS Edge.
Answered by
Crystal@MCARBO.com / September 29, 2021 9:30 AM

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