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Review
Had a 7 pound trigger before installing and have a 7 pound trigger after installation maybe a little smoother its hard to tell with out having them side by side
I have 509 one Tactical and Compact. Both have the Apex trigger on them. Both trigger internal have been all polished. The Tactical started out with 4.5lbs trigger pull. with the slide springs went to 3-3.25lbs. with the Sear Spring, Disconnector Spring, down to 3- 2.75lbs. (Also removed the grittiness,feel of the trigger take up). The compact started out with 4.5-4.8lbs trigger pull. with the slide springs down to 3.5lbs. With the Sear Spring, Disconnector Spring, down to 3.25 -3lbs. The best $20 upgrade for the $$$
I installed it in my FNS 40 LS, the video direction make installation very doable. The trigger pull is much smoother and lighter, I am very happy with the results
You need to have the breakdown block to make it easier to get the pins out but they’re not necessary. Spring kit is pretty easy to put in even for guys with huge hands like me. FN made their 509 a common sense assembly for the most part. It worked great at the range with my new apex trigger.
This is a great kit - best option out there to cheaply and easily get the FN 509's trigger smooth, light(er), and crisp. The factory trigger is absolutely terrible. I am not sure what they were thinking here. MCARBO's kit takes 30 min to install (watch their video).
Love my 509 but wasn't super happy with the trigger. So I ordered both the spring kit and the upgraded striker. Can already feel the difference. Love the installation videos, you guys are my go to for spring upgrades.
Installed the FN509 trigger spring kit, before the install trigger pull was over 8 lb, after the install trigger pull is 5 lb.
I just got the FN509 spring kit. Shipping was fast and the product looks like a quality kit. I will be putting it in my gun this weekend.
What a difference this kit makes in a pistol, I didn't do the work myself, but the trigger pull was 3lbs lighter, It's like a different pistol. AMAZING !
I've had this pistol for about a year now and the only thing I dislike about it is the trigger. It's just gritty, nasty, and heavy. This kit is the first thing I've bought on my quest to refine this trigger and it has changed it dramatically! Install went very smooth, took about an hour. I am very satisfied with the results, thank you for developing this! Next will be a metal trigger!
Thought they did exactly what I wanted. Made the stock trigger alot lighter. Would recommend trying this opinion before going to aftermarket trigger. Can install yourself in about 30 to 45 minutes. Iam buying spring kit for m&p 2.0 9mm now. Thanks m carbo Brandin Wells
Of all the guns I own, not a single one gave me buyer's remorse like the FN 509T. I bought it for its looks what it offered as a package (I mean, FN threw the kitchen sink on this firearm). But that trigger pull was so heavy right out of the box, it affected my accuracy when at the range. I've put 750 rounds through it hoping that it would get lighter over time but it didn't. The only thing that's gotten better was that annoying gritty feeling, which thankfully started to fade a little, as the transition from wall-to-break became more defined. I didn't want to go the Apex route just to fix this because #1: I am no gunsmith, #2: I heard about people cracking their frames trying to punch one of the pins out #3: throwing more money at this gun was a no-no for me. So I figured there's got to be an alternative. Enters M CARBO Spring Kit. $20 folks!!! TWENTY!!! That was all it took to fall in love again with my 509. If you ever shot a CZ P10, you know how amazing their triggers are. Now, shave between 0.3 to 0.5 oz off that CZ P10C trigger (which out of the box is measured at 4.5 lbs) and that's what you'll be getting with this spring kit. The Youtube tutorial was very helpful. I had my fair share of struggle with the sear spring, but a little patience and being ok with walking away from it all to reset did the trick lol. The trouble was worth it! Shipping was very fast considering the times we're living in. I ordered it on a Saturday and got it at my doorstep by Tuesday, and you'll be updated on the status of your order as you'd expect from any serious business. Great buying experience, great customer service, and exceeded expectations as far as the product is concerned! Bravo!
This kit and a Apex trigger and sear Really works nice! Pull is quite crisp and under 4lbs with some minor polishing as well.
Using an inexpensive basic Wheeler trigger guard, pre pull was just shy of 8 lbs. After installation of the kit..hovering around 5 lbs. 200 rnds 115 gr 9mm next morning range shots provided much improvement in trigger pressure/pull with more anticipated . Return is the same as I have not replace the trigger unit. Install is easy but steady tools and patience are required as they are very small parts. 5 star rating, 20 bucks?? Well worth it, I may still consider the Apex drop in kit, but for now...:)
I just installed 2 of these kits, 1 in a 509 tactical, and 1 in an FNS (the kit worked in the FNS without any issues). Install was fairly easy following the instructional video. Just be sure to watch the small parts and you should be fine. My 509 had a stock trigger pull of 7.5#, dropped to 6.5# with the frame springs installed, and finished at 5# with the slide springs. My FNS started at 7#, dropped to 6# with frame springs, and finished at 4.5# with the slide springs. Overall, based on my experience, it seams safe to expect around a 1# reduction from stock weight with the frame springs, and another 1.5# with the slide springs. I'm unsure how it would affect these numbers if you installed the parts in the reverse order. Overall reduction from stock should be around 2.5#. A 30+% reduction ain't bad at all! The only downside to this kit is that it initially seams a bit pricey for what you get in the bag. The end results are well worth the money however! I would definitely buy this kit again if I had another striker fired FN.
The kit arrived very promptly, did the install, preformed as stated. I installed the 3.5lb kit and is great, very pleased and just ordered a kit for my Kimber Micro 9. The fun never ends.