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  • Sig Sauer P320 Short Stroke Flat Trigger Upgrade
  • Sig Sauer P320 with Short Stroke Flat Trigger Installed
  • Sig Sauer P320 Trigger Kit - What's Included
  • Sig Sauer P320 Stock Trigger Comparison
  • Sig P320 Flat Trigger Build Comparison
  • Flat Trigger Upgrade for Sig Sauer P320
  • P320 Short Stroke Flat Trigger
  • Set Screw Adjustment Fixture Demo
  • Sig Sauer P320 Trigger Adjustment while Installed
  • Sig Sauer P320 Flat Trigger Upgrade
product-image

Sig Sauer P320 Short Stroke Flat Trigger Upgrade

review-star review-star review-star review-star review-star
(4.92) 26 reviews
Price: $74.95
in-stock-product Availability: IN STOCK

Retail: Retail: $89.99

You Save: $15.04 (16.7%)


Quantity:
pledge
Product Information

About This Item

  • Custom designed to reduce trigger pull weight and travel, enhancing the Sig P320 trigger experience.
  • Trigger breaks precisely at 90 degrees.
  • Features adjustable screws that minimize both pre-travel and over-travel.
    • Achieves a significant 58% reduction in total trigger travel compared to OEM.
    • Set screw adjustments can lead to a reduction of up to 70% of trigger travel.
    • Accomplishes a substantial 90% reduction in pre-travel with set screw adjustment.
  • Precision-machined on a 5th Axis CNC from solid 4140 steel billet - No MIM components!
  • Enhanced trigger reset and break angles result in 58% less travel than the OEM trigger, a significant improvement for the Sig Sauer P320 trigger upgrade.
  • The short-stroke P320 flat trigger design offers the shortest travel compared to OEM and other aftermarket options.
    • Includes an over-travel set screw adjustment fixture for optimal tuning.
  • Sig P320 flat trigger design allows for improved leverage, simulating a 1/2lb lighter pull.
  • Smooth edges and a rounded tip to prevent trigger bite.
  • Tumbled Smooth & Black Nitride Lifetime Finish.
  • Do you want Us to Install the Parts and Do the Polishing Work for You?
  • Protected by the M*CARBO 100% Lifetime Guarantee
  • Made in the USA!
  • Fast Same Day Shipping!

WHAT'S IN THE KIT:

  • 1 - Precision CNC Machined Sig Sauer P320 Flat Trigger
  • 1 - 1/16" Hex L-Key
  • 1 - 3/32" Hex L-Key
  • 1 - 3/8" Pre-Travel Set Screw
  • 1 - 3/16" Over-Travel Set Screw
  • 1 - Over-Travel Set Screw Adjustment Fixture

Installation Video

Description

Sig Sauer P320 Short Stroke Flat Trigger

*Designed and Tested for all Sig P320 Fire Control Units that conform to the current production design standard which was implemented after September 2017. If you are unsure about the production date of your firearm, please verify it now by entering your serial number on the Sig Sauer Website.

3 Steps to Upgrading your Sig Sauer P320 Pistol

Experience the ultimate upgrade with the M*CARBO Sig P320 Trigger Upgrade, expertly designed to enhance your shooting experience by significantly reducing trigger pull weight and travel. This custom-designed trigger breaks exactly at 90 degrees for a precise, crisp pull every time.

M*CARBO vs OEM P320 Trigger Break Angle Comparison

Our trigger offers an impressive 58% total trigger travel reduction from OEM and a 70% reduction of trigger travel with total set screw adjustment. This feature results in a 90% pre-travel reduction, surpassing OEM and all aftermarket options.

Engineered with meticulous precision, this trigger is 5th Axis CNC machined from a SOLID billet of 4140 steel. The innovative flat trigger design allows shooters to place their fingers lower on the trigger, improving leverage and making the trigger pull feel approximately 1/2lb lighter.

The M*CARBO Sig Sauer P320 Short Stroke Flat Trigger features extra smooth edges and a rounded tip at the bottom to prevent trigger bite. Each trigger undergoes a tumbling process for smoothness and is finished with a long-lasting black nitride coating.

Our Sig Sauer P320 Trigger comes with an Over-Travel Set Screw Adjustment Fixture for fine-tuning and maximum travel reduction.

Make precise adjustments effortlessly without the need to disassemble your P320.

Sig Sauer P320 Resources:

If you're getting the Sig Sauer P320 Short Stroke Flat Trigger Upgrade, then you might find the following Sig Sauer P320 Resources useful in further enhancing your firearm. Download the Sig Sauer P320 Owners Manual or use the Sig Sauer P320 Exploded View as a Parts Diagram to plan your next firearm project.

Sig Sauer P320 Owner's Manual
Sig Sauer P320 Exploded View

M*CARBO No Hassle 100% Lifetime Guarantee:

The Sig Sauer P320 Short Stroke Flat Trigger Upgrade is protected by the M*CARBO No Hassle 100% Lifetime Guarantee.

Drop Tested and Approved:

Sig Sauer P320 Short Stroke Flat Trigger Upgrade is drop Tested according to SAAMI Standard Z299.5 rating (12" & 48").

Tested and Approved:

The Sig Sauer P320 Short Stroke Flat Trigger Upgrade has been tested repeatedly to ensure reliable operation and safety.

Veteran Owned and Operated Business:

American made Sig Sauer P320 Short Stroke Flat Trigger Upgrade is designed and manufactured by Combat Veterans. We will donate a portion of your purchase to the Military Foundations we humbly support.

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 P320 Short Stroke Flat Trigger Upgrade. 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
Crispy
review-star review-star review-star review-star review-star
This trigger upgrade is nice. I installed it on a custom works fcu which had a pretty low trigger weight, 3.5 lbs. I used the spring kit as well and together it reduced trigger pull weight slightly but improved the feel of the trigger overall. I think it’s right around 3 lbs now and very crispy reset. Note it is still a p320 trigger so you can only do so much but great improvement.
So clearly better than the stock trigger
review-star review-star review-star review-star review-star
I liked the stock X trigger compared to many other stock triggers. It was fine. But the more I watched reviews on YouTube the more I was convinced to have better. Once I did the adjustments with the screws it was clearly better in the right ways to the stock trigger without seeming to much like a race gun. Still have yeet to test it at the range so I hope the screws don't walk at all. I used blue lock tight and it's set.
review image  
New Trigger
review-star review-star review-star review-star review-star
Really nice new trigger. Helps with the uptake on the pull as well as the reset on the trigger. Happy with how it works and would do it again.
Short Stroke Flat Trigger + Trigger Spring Kit for SIG P320 M18 with Manual Safety
review-star review-star review-star review-star review-star
The order was shipped promptly and delivered as expected. The flat trigger is made much better than stock.

Installed the trigger and the spring kit took longer than expected, as the trigger pin was a pain in the ass to get out.

-The flat trigger's at rest position is about .175" rearwards vs the stock trigger, a huge difference for smaller hands.
-The stock trigger traveled about .536" before breaking. The adjustable flat trigger traveled about .210".
-The stock trigger pull measured 5#14oz before installation. The trigger and strings upgrades* measured 2#12oz.

There were a few comments about light strikes, I can always go back to the OEM spring if needed.

*Since this is a range gun, I also replaced the striker safety lever spring with a spring from inside of a 3.5" floppy disk. Don't try this if this is your EDC or HD piece.

p.s. The measurements are approximate. YMWV.
SIG P320 SHORT STROKE TRIGGER
review-star review-star review-star review-star review-star
MCARBO SIG P320 SHORT STROKE TRIGGER MADE A HUGE DIFFERENCE IN TRIGGER TAKE UP AND TRIGGER PULL WEIGHT MORE THAN HAPPY WITH RESULTS
Great Trigger
review-star review-star review-star review-star review-star
This trigger is a vast improvement on a p320 M18's factory trigger. The squishiness of the trigger and weight is still there as this doesn't affect those, but the pull is much smooth and there is no take up.
SIG P320 SHORT STROKE TRIGGER
review-star review-star review-star review-star review-star
MCARBO SIG P320 SHORT STROKE TRIGGER UPGRADE INSTALLATION WAS FAIRLY SIMPLE THE RESULTS ARE AMAZING IT MADE A HUGE DIFFERENCE IN MY P320 CARRY TRIGGER IS AWESOME
Excellent
review-star review-star review-star review-star review-star
Try this before tinkering with anything else.
Questions & Answers
0 0
Question:
Hi there, I just got the P320 M18 here in California . Please let me know if your "Sig Sauer P320 Short Stroke Flat Trigger Upgrade" will work/fit on my M18? Will it improve the trigger pull? Many thanks
Jenna December 17, 2023 11:27 PM
0 0
Question:
Why is this Mcarbo trigger not compatible with Sig P320's (X-Ten) shooting 10mm?
oystershooter November 10, 2023 8:47 PM
0 0
Question:
Will this work with the apex trigger bar installed?
JB Farms October 31, 2023 5:04 AM
Answers
Yes, it will.
Answered by
M*CARBO-Tech / November 8, 2023 7:14 AM
0 0
Question:
Is this trigger suitable for use on the sig p320 X Five Legion?
jose mauricio paiva October 13, 2023 8:01 PM
Answers
Yes, this is a great addition for your P320 X Five Legion.
Answered by
M*CARBO-Tech / November 8, 2023 7:15 AM
0 0
Question:
Will this work on a Sig Sauer p320 9mm compact pistol?
September 22, 2023 6:09 AM
Answers
Yes, it will. In our Product Information section you will be able to see all the P320 models this trigger is compatible with.
Answered by
M*CARBO-Tech / September 29, 2023 8:33 AM
0 0
Question:
Is the trigger upgrade as big of a difference on the p320 vtac ?
Park.nathan.a May 13, 2023 4:37 PM
Answers
The P320 VTAC has Sig's standard x-series flat trigger so yes, you will be able to significantly reduce your pre-travel and over-travel with this P320 trigger upgrade.
Answered by
M*CARBO-Tech / September 29, 2023 8:32 AM
0 0
Question:
Dont hate me, new to SIG, and want to make sure it'll work in my gun, but will this trigger work in the new SIG XTEN fire control unit?
JoshuaMRHP1NUC March 18, 2023 2:37 AM
Answers
It should be perfect for the perfect caliber.
Answered by
grewterd / August 5, 2023 8:55 PM
Yes it will work
Answered by
M*CARBO-Tech / March 22, 2023 10:06 AM
0 0
Question:
I have just purchased a new P320 M18 so I know it is the updated version. My question is would it be possible to disable any of the new internal safety features by installing the flat trigger , say like maybe the drop SAFTY or others? Thanks!!
armyrat January 22, 2023 7:22 PM
Answers
Our trigger is drop tested according to SAAMI Standard Z299.5 rating (12" & 48").
Answered by
Timothy Parrish / January 24, 2023 2:07 PM
0 0
Question:
Since installing trigger, I've had several light primer strikes. Has anyone else had this issue
January 11, 2023 7:18 PM
Answers
Please email us at Help@macarbo.com to help you better with this issue. Changing your trigger doesn't cause light strikes
Answered by
Waldo@MCARBO / January 30, 2023 9:50 AM
0 0
Question:
Has anyone complained of, light primer strikes. Thought it was just one of the two boxes of ammo I was using. Cleaned gun and shot it again yesterday. It continues to have light primer strikes on different brands of ammo
January 8, 2023 7:17 PM
Answers
Please email us at Help@macarbo.com to help you better with this issue. Changing your trigger doesn't cause light strikes.
Answered by
Waldo@MCARBO / January 30, 2023 10:43 AM
0 0
Question:
Will this work with my 365XL
pvcowboy November 22, 2022 10:28 AM
Answers
No. This is for the P320. We have a P365 trigger that will fit in P365 models.
Answered by
Steven Kalchbrenner / December 30, 2022 11:13 AM

About This Item

  • Custom designed to reduce trigger pull weight and travel, enhancing the Sig P320 trigger experience.
  • Trigger breaks precisely at 90 degrees.
  • Features adjustable screws that minimize both pre-travel and over-travel.
    • Achieves a significant 58% reduction in total trigger travel compared to OEM.
    • Set screw adjustments can lead to a reduction of up to 70% of trigger travel.
    • Accomplishes a substantial 90% reduction in pre-travel with set screw adjustment.
  • Precision-machined on a 5th Axis CNC from solid 4140 steel billet - No MIM components!
  • Enhanced trigger reset and break angles result in 58% less travel than the OEM trigger, a significant improvement for the Sig Sauer P320 trigger upgrade.
  • The short-stroke P320 flat trigger design offers the shortest travel compared to OEM and other aftermarket options.
    • Includes an over-travel set screw adjustment fixture for optimal tuning.
  • Sig P320 flat trigger design allows for improved leverage, simulating a 1/2lb lighter pull.
  • Smooth edges and a rounded tip to prevent trigger bite.
  • Tumbled Smooth & Black Nitride Lifetime Finish.
  • Do you want Us to Install the Parts and Do the Polishing Work for You?
  • Protected by the M*CARBO 100% Lifetime Guarantee
  • Made in the USA!
  • Fast Same Day Shipping!

WHAT'S IN THE KIT:

  • 1 - Precision CNC Machined Sig Sauer P320 Flat Trigger
  • 1 - 1/16" Hex L-Key
  • 1 - 3/32" Hex L-Key
  • 1 - 3/8" Pre-Travel Set Screw
  • 1 - 3/16" Over-Travel Set Screw
  • 1 - Over-Travel Set Screw Adjustment Fixture

Installation Video

Sig Sauer P320 Short Stroke Flat Trigger

*Designed and Tested for all Sig P320 Fire Control Units that conform to the current production design standard which was implemented after September 2017. If you are unsure about the production date of your firearm, please verify it now by entering your serial number on the Sig Sauer Website.

3 Steps to Upgrading your Sig Sauer P320 Pistol

Experience the ultimate upgrade with the M*CARBO Sig P320 Trigger Upgrade, expertly designed to enhance your shooting experience by significantly reducing trigger pull weight and travel. This custom-designed trigger breaks exactly at 90 degrees for a precise, crisp pull every time.

M*CARBO vs OEM P320 Trigger Break Angle Comparison

Our trigger offers an impressive 58% total trigger travel reduction from OEM and a 70% reduction of trigger travel with total set screw adjustment. This feature results in a 90% pre-travel reduction, surpassing OEM and all aftermarket options.

Engineered with meticulous precision, this trigger is 5th Axis CNC machined from a SOLID billet of 4140 steel. The innovative flat trigger design allows shooters to place their fingers lower on the trigger, improving leverage and making the trigger pull feel approximately 1/2lb lighter.

The M*CARBO Sig Sauer P320 Short Stroke Flat Trigger features extra smooth edges and a rounded tip at the bottom to prevent trigger bite. Each trigger undergoes a tumbling process for smoothness and is finished with a long-lasting black nitride coating.

Our Sig Sauer P320 Trigger comes with an Over-Travel Set Screw Adjustment Fixture for fine-tuning and maximum travel reduction.

Make precise adjustments effortlessly without the need to disassemble your P320.

Sig Sauer P320 Resources:

If you're getting the Sig Sauer P320 Short Stroke Flat Trigger Upgrade, then you might find the following Sig Sauer P320 Resources useful in further enhancing your firearm. Download the Sig Sauer P320 Owners Manual or use the Sig Sauer P320 Exploded View as a Parts Diagram to plan your next firearm project.

Sig Sauer P320 Owner's Manual
Sig Sauer P320 Exploded View

M*CARBO No Hassle 100% Lifetime Guarantee:

The Sig Sauer P320 Short Stroke Flat Trigger Upgrade is protected by the M*CARBO No Hassle 100% Lifetime Guarantee.

Drop Tested and Approved:

Sig Sauer P320 Short Stroke Flat Trigger Upgrade is drop Tested according to SAAMI Standard Z299.5 rating (12" & 48").

Tested and Approved:

The Sig Sauer P320 Short Stroke Flat Trigger Upgrade has been tested repeatedly to ensure reliable operation and safety.

Veteran Owned and Operated Business:

American made Sig Sauer P320 Short Stroke Flat Trigger Upgrade is designed and manufactured by Combat Veterans. We will donate a portion of your purchase to the Military Foundations we humbly support.

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 P320 Short Stroke Flat Trigger Upgrade. 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 (26)
review-star review-star review-star review-star review-star
4.92
Crispy
review-star review-star review-star review-star review-star
This trigger upgrade is nice. I installed it on a custom works fcu which had a pretty low trigger weight, 3.5 lbs. I used the spring kit as well and together it reduced trigger pull weight slightly but improved the feel of the trigger overall. I think it’s right around 3 lbs now and very crispy reset. Note it is still a p320 trigger so you can only do so much but great improvement.
So clearly better than the stock trigger
review-star review-star review-star review-star review-star
I liked the stock X trigger compared to many other stock triggers. It was fine. But the more I watched reviews on YouTube the more I was convinced to have better. Once I did the adjustments with the screws it was clearly better in the right ways to the stock trigger without seeming to much like a race gun. Still have yeet to test it at the range so I hope the screws don't walk at all. I used blue lock tight and it's set.
review image  
New Trigger
review-star review-star review-star review-star review-star
Really nice new trigger. Helps with the uptake on the pull as well as the reset on the trigger. Happy with how it works and would do it again.
Short Stroke Flat Trigger + Trigger Spring Kit for SIG P320 M18 with Manual Safety
review-star review-star review-star review-star review-star
The order was shipped promptly and delivered as expected. The flat trigger is made much better than stock.

Installed the trigger and the spring kit took longer than expected, as the trigger pin was a pain in the ass to get out.

-The flat trigger's at rest position is about .175" rearwards vs the stock trigger, a huge difference for smaller hands.
-The stock trigger traveled about .536" before breaking. The adjustable flat trigger traveled about .210".
-The stock trigger pull measured 5#14oz before installation. The trigger and strings upgrades* measured 2#12oz.

There were a few comments about light strikes, I can always go back to the OEM spring if needed.

*Since this is a range gun, I also replaced the striker safety lever spring with a spring from inside of a 3.5" floppy disk. Don't try this if this is your EDC or HD piece.

p.s. The measurements are approximate. YMWV.
SIG P320 SHORT STROKE TRIGGER
review-star review-star review-star review-star review-star
MCARBO SIG P320 SHORT STROKE TRIGGER MADE A HUGE DIFFERENCE IN TRIGGER TAKE UP AND TRIGGER PULL WEIGHT MORE THAN HAPPY WITH RESULTS
Great Trigger
review-star review-star review-star review-star review-star
This trigger is a vast improvement on a p320 M18's factory trigger. The squishiness of the trigger and weight is still there as this doesn't affect those, but the pull is much smooth and there is no take up.
SIG P320 SHORT STROKE TRIGGER
review-star review-star review-star review-star review-star
MCARBO SIG P320 SHORT STROKE TRIGGER UPGRADE INSTALLATION WAS FAIRLY SIMPLE THE RESULTS ARE AMAZING IT MADE A HUGE DIFFERENCE IN MY P320 CARRY TRIGGER IS AWESOME
Excellent
review-star review-star review-star review-star review-star
Try this before tinkering with anything else.

Questions & Answers

11 Questions

0 0
Question:
Hi there, I just got the P320 M18 here in California . Please let me know if your "Sig Sauer P320 Short Stroke Flat Trigger Upgrade" will work/fit on my M18? Will it improve the trigger pull? Many thanks
Jenna December 17, 2023 11:27 PM
0 0
Question:
Why is this Mcarbo trigger not compatible with Sig P320's (X-Ten) shooting 10mm?
oystershooter November 10, 2023 8:47 PM
0 0
Question:
Will this work with the apex trigger bar installed?
JB Farms October 31, 2023 5:04 AM
Answers
0 0
Yes, it will.
Answered by
M*CARBO-Tech / November 8, 2023 7:14 AM
0 0
Question:
Is this trigger suitable for use on the sig p320 X Five Legion?
jose mauricio paiva October 13, 2023 8:01 PM
Answers
0 0
Yes, this is a great addition for your P320 X Five Legion.
Answered by
M*CARBO-Tech / November 8, 2023 7:15 AM
0 0
Question:
Will this work on a Sig Sauer p320 9mm compact pistol?
September 22, 2023 6:09 AM
Answers
0 0
Yes, it will. In our Product Information section you will be able to see all the P320 models this trigger is compatible with.
Answered by
M*CARBO-Tech / September 29, 2023 8:33 AM
0 0
Question:
Is the trigger upgrade as big of a difference on the p320 vtac ?
Park.nathan.a May 13, 2023 4:37 PM
Answers
0 0
The P320 VTAC has Sig's standard x-series flat trigger so yes, you will be able to significantly reduce your pre-travel and over-travel with this P320 trigger upgrade.
Answered by
M*CARBO-Tech / September 29, 2023 8:32 AM
0 0
Question:
Dont hate me, new to SIG, and want to make sure it'll work in my gun, but will this trigger work in the new SIG XTEN fire control unit?
JoshuaMRHP1NUC March 18, 2023 2:37 AM
Answers
0 0
It should be perfect for the perfect caliber.
Answered by
grewterd / August 5, 2023 8:55 PM
0 0
Yes it will work
Answered by
M*CARBO-Tech / March 22, 2023 10:06 AM
0 0
Question:
I have just purchased a new P320 M18 so I know it is the updated version. My question is would it be possible to disable any of the new internal safety features by installing the flat trigger , say like maybe the drop SAFTY or others? Thanks!!
armyrat January 22, 2023 7:22 PM
Answers
0 0
Our trigger is drop tested according to SAAMI Standard Z299.5 rating (12" & 48").
Answered by
Timothy Parrish / January 24, 2023 2:07 PM
0 0
Question:
Since installing trigger, I've had several light primer strikes. Has anyone else had this issue
January 11, 2023 7:18 PM
Answers
0 0
Please email us at Help@macarbo.com to help you better with this issue. Changing your trigger doesn't cause light strikes
Answered by
Waldo@MCARBO / January 30, 2023 9:50 AM
0 0
Question:
Has anyone complained of, light primer strikes. Thought it was just one of the two boxes of ammo I was using. Cleaned gun and shot it again yesterday. It continues to have light primer strikes on different brands of ammo
January 8, 2023 7:17 PM
Answers
0 0
Please email us at Help@macarbo.com to help you better with this issue. Changing your trigger doesn't cause light strikes.
Answered by
Waldo@MCARBO / January 30, 2023 10:43 AM
0 0
Question:
Will this work with my 365XL
pvcowboy November 22, 2022 10:28 AM
Answers
0 0
No. This is for the P320. We have a P365 trigger that will fit in P365 models.
Answered by
Steven Kalchbrenner / December 30, 2022 11:13 AM