- Reduce your SIG SAUER P365 trigger pull weight from a factory ~6.5 lbs down to a modified ~4 lbs (results may vary ±1 lb)
- Newer P365 models may be 0.5 to 1 lb lighter due to the factory flat trigger design
- 38% trigger pull weight reduction
- Improves accuracy and overall SIG SAUER P365 pistol performance
- Compatible with SIG SAUER P365, P365 .380, P365 SAS, P365 XL, P365 X, P365 X-Macro, P365 AXG, and P365 LUXE
- Premium American Made SIG SAUER P365 accessories by M*CARBO
- Ideal for a custom P365 trigger job
- Smoother trigger feel and improved shooting control
- Includes custom lighter springs for optimized trigger performance
- Protected by the M*CARBO 100% Lifetime Guarantee
- Made in the USA
- Optional professional installation and polishing services available
- Fast Same Day Shipping Available!
WHAT'S IN THE KIT:
- 1 - Custom Lighter P365 Sear Spring
- 1 - Custom Lighter P365 Striker Spring
- 1 - Custom Lighter P365 Striker Block Spring
Sig Sauer P365 Trigger Spring Kit
Enhance your firearm's performance with the Sig P365 Trigger Spring Kit by M*CARBO. This top-quality American-made upgrade offers a significant 38% reduction in trigger pull from a stock ~6.5lbs to a modified ~4lbs, ensuring a smoother and lighter trigger pull.
Ideal for both novice and expert shooters, this custom Sig Sauer P365 Trigger Job is designed to improve your accuracy and overall pistol performance. It works seamlessly with Sig Sauer P365, Sig Sauer P365 380, Sig Sauer P365SAS, Sig Sauer P365XL, Sig Sauer P365X, Sig Sauer P365 X-Macro, Sig Sauer P365 AXG, and Sig Sauer P365 LUXE models.
For maximum performance, pair this spring kit with the Sig Sauer P365 Short Stroke Flat Trigger by M*CARBO. This combination provides the shortest length of pull over OEM and a solid steel replacement for OEM MIM parts, taking your firearm's performance to competition level.
These Sig Sauer P365 Aftermarket Parts are meticulously designed by combat veterans to correct factory Sig Sauer P365 problems and are considered must-have Sig Sauer P365 upgrades. This quick and easy 20-minute upgrade is the best way to improve your Sig Sauer P365 trigger pull and achieve better shooting results.
Check out this review by Dirty Civilian featuring former CAG/Delta Operator Kyle Lamb!
Get the most out of your Sig Sauer P365 9mm with this exceptional trigger upgrade. Also suitable as Sig Sauer P365 XL accessories, P365SAS upgrades, and P365 LUXE upgrades. Upgrade today for improved accuracy and performance!
If you have ideas for more Sig Sauer P365 Accessories send us an email at help@mcarbo.com.
Sig Sauer P365 Resources:
If you're getting the Sig Sauer P365 Trigger Spring Kit, then you might find the following Sig Sauer P365 Resources useful in further enhancing your firearm. Download the Sig Sauer P365 Owners Manual or use the Sig Sauer P365 Exploded View as a Parts Diagram to plan your next firearm project.
Drop Tested and Approved:
Sig Sauer P365 Trigger Spring Kit is drop Tested according to SAAMI Standard Z299.5 rating (12" & 48").
Tested and Approved:
The Sig Sauer P365 Trigger Spring Kit has been tested repeatedly to ensure reliable operation and safety.
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 Sig Sauer P365 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.
Wasted money
The striker spring consistently caused light primer strikes and made the gun unusable. What a waste of money and time.
Great kit
I installed this spring kit in a 365XL and it took the trigger pull from 6 1/2 lbs down to just over 4. Made me actually enjoy shooting the gun.
DO NOT USE on anything your life depends on
I put the spring kit in both my X macro and P365 Fuse. Both operated flawlessly for several hundred rounds.
Then all of a sudden, after normal cleaning and use, I started getting light primer strikes on multiple rounds. Sadly, I trusted this in my Xmacro, which is my carry gun. This would’ve been devastating had it been required to be used in a life and death situation.
Fortunately, I practice regularly with these guns. After a day at the range having several failures, and after a recent cleaning, I put the stock spring kit back in and then proceeded to run 400+ round through each gun without a single light primer strike.
Don’t expect if the spring kit feels better and works out of the gate that you can trust a long-term, seeing other reviews and the fact that I had failures on both guns I installed this kit on tells me that this isn’t something that you should trust in a gun that your life depends on.
DO NOT USE on anything your life depends on
I put the spring kit in both my X macro and P365 Fuse. Both operated flawlessly for several hundred rounds.
Then all of a sudden, after normal cleaning and use, I started getting light primer strikes on multiple rounds. Sadly, I trusted this in my Xmacro, which is my carry gun. This would’ve been devastating had it been required to be used in a life and death situation.
Fortunately, I practice regularly with these guns. After a day at the range having several failures, and after a recent cleaning, I put the stock spring kit back in and then proceeded to run 400+ round through each gun without a single light primer strike.
Don’t expect if the spring kit feels better and works out of the gate that you can trust a long-term, seeing other reviews and the fact that I had failures on both guns I installed this kit on tells me that this isn’t something that you should trust in a gun that your life depends on.
Awesome Fix
OMG, the trigger on my 365 was so mushy and hard to pull. I put the new springs in with the help of your video and bam, just like that, the trigger is excellent. Thank you for your excellent product and your equally excellent installation video.
Frequent misfires, light strikes - poor product support
I purchased and installed this spring kit along with a short stroke trigger and my Sig P365X began to have frequent misfires, which I believe were due to light fire pin strikes. I called customer service and they could not help me. They told me that I needed to write an email to their support staff and that their gunsmith would respond. After a couple of weeks, no response. I contacted customer service again and they said they would talk to the gunsmith about the delay in response. Now a week later, still no response. This is my everyday carry gun. I finally removed the MCarbo springs and replaced them with the original factory springs. I have had no misfires since this change. Based upon this experience, I have come to the conclusion that MCarbo’s customer support is very poor, if not nonexistent. I also questioned the quality of their products. As a final note, thinking there might be a break-in period, I put about 400 rounds through my pistol with their springs before replacing them with the original manufacturer ones. Breaking them in didn’t fix the problem.
Mcarbo Trigger Kit: Elevates the P365 to Its True Potential
The Mcarbo upgrade transforms the SIG Sauer P365 into the pistol it was meant to be right out of the factory. It eliminates the heavy, mushy trigger pull that exceeds 6 pounds, bringing it down to a consistent 3-3.5 pounds with this kit. The gun now feels significantly better to handle. I'd recommend that anyone looking to enhance their P365 should start with the Mcarbo trigger kit!
A Must Have 🔥🔥🔥
I installed the Mcarbo P365 Flat Trigger and loved it so much I bought another for my new build. After adding these Mcarbo Spring Kits with the Mcarbo Trigger its a game changer. I highly recommend this. 🔥🔥🔥
John the Barber 💈
Akron, OH
i've heard this could cause light strikes. is true?
December 29, 2025 11:11 AM
Anytime you change to lighter springs you run the risk of light strikes - We stand by all of our products with a full warranty.
Does it fits with FUSE?
Yes it will work with the Fuse Model.
Sig Sauer P365 Trigger Spring Kit will this work in sig 365 fuse
Yes this kit will work in the Fuse Model.
Will the trigger spring kit work in Sig P365XCA-9-TACOPS. The slide has an X stamped on it. It has a 3.7In barrell.
Yes - The spring kit will work
So, does this kit fit the fuse or no?
2403 January 30, 2025 8:30 PM
Yes, it works in the Fuse.
Answered by
Sorzy /
April 3, 2026 5:27 PM
Ordered the flat trigger and was wondering does this spring kit work in the p365 fuse I didn't see it in the model list
I installed the flat trigger in my fuse, but my fuse has one piece striker spring cup that i could not remove. i'm looking for the regular spring cups in stock somewhere and i'll cut the one piece off and replace with 2 piece cups. i had an extra assembled striker lying around, so i upgraded the springs and put it in my fuse. good luck.
Answered by
/
January 28, 2025 1:48 PM
Does the spring kit besides lessening over travel does it take away the trigger creep that I seem to experience with this weapon?
the Sig P365 Trigger Spring Kit is primarily designed to reduce trigger pull weight and shorten over-travel, it can also help reduce trigger creep to a small extent due to smoother spring engagement and improved trigger reset.
Answered by
FOXX /
December 13, 2024 1:34 PM
Will this spring kit work with the P365 AXG?
February 28, 2024 12:14 PM
Yes, the Sig Sauer P365 Trigger Spring Kit is compatible with the P365 AXG.
Answered by
FOXX /
December 13, 2024 12:56 PM
Will this trigger kit work on the CA model 365's?
Yes, the Sig P365 Trigger Spring Kit is compatible with California-compliant (CA model) Sig P365 pistols.
The internal fire control unit (FCU) remains the same across standard and CA-compliant models, so the trigger spring kit will fit and function correctly
Answered by
FOXX /
December 13, 2024 1:31 PM
I own an XMacro, just got the kit today, and the video shows a completely different end cap assembly than the XMacro, so now I am stuck and cant install this, because there isn't a space to push the striker ring down and I don't want to mess my gun up. What gives, and why didn't anyone mention that Xmacros aren't the same?!
Sig now seems to use a one-piece, off-white nylon-like plastic striker spring retaining clip in place of the two-piece retaining cups they previously used. It's sort of like a "C-clip" and, like a "C-clip", it has one gap at which you can spread it a bit to push it over the striker and remove it. Unlike the two-piece retaining cups, which fall off the striker easily when the spring is compressed out of the way, this one is a PITA and takes some effort to push off the striker. My fingers were getting tired holding the spring in a compressed state, so I tied the striker spring up with dental floss to keep it out of the way while I worked to get the factory spring retainer off. It all worked out fine. All good.
Try SigGuy on YouTube. Best videos of they're. Super clear videos and great explanations including what could happen and shortcuts.
While I found the somewhat obscure video in question Blythe same evening before the other reply to my question, it’s stilll torques me that MCarbo wouldn’t take the time to make some sort of small note somewhere on the page or in the notes of the installation video (not saying you’d have to reshoot it) that would make people aware that ALL NEW. 365s ship with a slide striker spring collar that prevents the end cap from being removed in the manner shown on the video.
This isn’t some small detail and should be addressed considering you’re emphasizing the ease of the DYI aspect of this.
To MCarbo,
Guys this is a failure, and I’m surprised I have to address this, make some small notation or warning statement saying that all newer models can’t be disassembled in this manner.
Answered by
RobOChubb /
August 28, 2023 7:04 AM
There are other videos on Youtube that show the other end cap removal. You have to deform the plastic tab and push it to the left and down to remove the end cap. Just do a little more research, you'll find it.
Answered by
/
August 27, 2023 4:37 PM
Would *YOU* hesitate to install this " MCARBO spring kit " with the "MCARBO SHORT STROKE FLAT TRIGGER" on your everyday carry gun.
rbdjr August 19, 2023 11:36 AM
I can confirm; I have standard P365 (with M*CARBO flat trigger) and while I love the feel of the lighter trigger spring kit, I too am getting much higher rate of lighter/failed striker hits on certain ammo. NOT COOL for an EDC. I’m going to have to go back to stock striker spring and just enjoy the flat trigger and whatever the other two remaining springs afford me.
Answered by
Enigma /
January 12, 2024 1:57 PM
Well... I am getting light primer strikes on both an XL and XMacro 365 that have this spring kit, causing the round not to go bang, very bad for an EDC.
Can't 100% verify it's the new spring kit, for sure, but will soon swap back in the original spring and see if that helps.
Well... I am getting light primer strikes on both an XL and XMacro 365 that have this spring kit, causing the round not to go bang, very bad for an EDC.
Can't 100% verify it's the new spring kit, for sure, but will soon swap back in the original spring and see if that helps.
Put it in mine - WOW great improvement!
Will your kit work with Armory Craft's Positive Reset Trigger Return / Trigger Bar Spring? Their full kit is a 4 piece while yours is just 3. I keep hearing about your springs so, I'm swapping my Armory Craft - P365 Ultimate Master Spring Tuning Kit with yours to see what the rave is about.
ROMEO July 8, 2023 9:57 PM
Well???? 👆Results???? It's been a year!
Will the spring kit also work on the p365xl spectre comp?
Why no sanding/ polishing on this spring set change? Will polishing reduce the trigger pull a little more?
Thanks brothers!!
Does this kit work with p365x?
Fits & Functions in Sig Sauer P365, Sig Sauer P365 380, Sig Sauer P365SAS, Sig Sauer P365XL and Sig Sauer P365 X-Macro
Is the kit made of stainless steel parts or some other type of metal/alloy?
Highest Quality American Spring Steel ASTM A228 Music Wire
Will this work on the P365 X Macro Comp.
Jafo October 26, 2022 4:28 PM
Yes it will, our kit has been tested on all 365 models, now including the x Macro Comp!
Will this kit work with the new P365 X Macro?
September 6, 2022 3:46 PM
Yes it will, our kit has been tested on all 365 models, now including the Macro!
Will this kit work on the P365XL, I the FCU ’s are the same besides the flat trigger
Thanks
Yes it will, our kit has been tested on all 365 models outside the Macro since that is a relatively new model.
Do you have an installation video for p365-380 without the manual safety?
the installation video on the website is without a manual safety.
the installation video on the website is without a manual safety.
the installation video on the website is without a manual safety.
What would be the effect if I installed just the striker springs? I am looking to reduce the trigger pull but also smooth it out.
By Just changing a spring you won't be getting the full benefits from the kit so you won't see much reduction
How much will this lower the pull weight WITHOUT installing the striker spring?
if you install the other springs it should be pretty close to what we advertise. It wont be spot on however it should be with in a pound. Its hard to give an exact measurement since each firearm is different and springs usually have a + or - a pound to them.
How much harder is it to install in a p365 with external safety?
Not much harder, all you have to do is remove the safety to make it easier to complete the install.
Does this work with the P365 .380 model?
yes our spring kit works in all P365 models!
Looking to improve take up and reset WITHOUT lowering pull weight. Will a combination of your springs and stock springs do the trick? Looking at your trigger shoe as well. Thanks!
Sorry for our delayed response in the Q&A's! If you want reduced pretravel and a crisper reset without decreasing your trigger pull weight, you definitely need our Short-Stroke Flat Trigger! Here's the link to this product:
https://www.mcarbo.com/sig-sauer-p365-short-stroke-flat-trigger-upgrade.aspx
This trigger will fit and function perfectly with the stock springs, which will ensure you maintain your current pull weight, and will give you everything you are looking for.
Does this work with the P365X?
Awesome! Thank you so much for sharing this with us and other customers!
Answered by
/
December 20, 2021 11:19 AM
I just finished putting this kit in my Sig P365X Romeo Zero and the function test checks out find. Haven't tried it at the range yet, but will in a few days.
I don't have a trigger gauge, but I'd say it lowered the trigger pull by a couple of pounds and I didn't install the sear spring...yet.
Answered by
/
December 18, 2021 4:16 PM
Yes. I can confirm, this does work with P365X. Followed the video and installed the kit. There is a slight difference with the P365X where the small spring behind the sleeve on the striker does not exist with the P365X. This is not a spring that is part of this kit, but it shows up in the install video. Just want others to be aware. The pistol performed flawlessly and felt great!
Answered by
/
December 17, 2021 7:05 AM
Hello, we have only tested and can guarantee compatibility in the Sig Sauer P365, Sig Sauer P365SAS and Sig Sauer P365XL. You are welcome to try it out and share your results with us. We do not currently have a P365X to test it in.
Answered by
/
December 16, 2021 12:26 PM