Need assistance? Call our experts: (727) 223-1816

  • Labeled Mossberg 500 Trigger Spring Kit - Hammer Spring and Trigger Return Spring
  • Mossberg 500/835 Trigger Spring Kit and Maverick 88 Trigger Spring Kit
  • Packaged Mossberg 500/835 and Maverick 88 Trigger Spring Kit M*CARBO
Labeled Mossberg 500 Trigger Spring Kit - Hammer Spring and Trigger Return Spring

Mossberg Shotguns 500 / 835 & Maverick 88 Trigger Spring Kit

review-star review-star review-star review-star review-star
(4.89) 409 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

Description

Mossberg 500 / 835 & Maverick 88 Trigger Spring Kit

  1. Custom Lighter Hammer Spring
  2. Custom Lighter Trigger Return Spring

The Mossberg 500 / 835 & Maverick 88 Trigger Spring Kit will reduce your trigger pull by nearly 50% from a factory weight of 8.5lbs to a modified weight of 4.75lbs. One of the Best Mossberg 500 Accessories available! The Mossberg Pump Action Shotgun Trigger Job will reduce malfunctions and improve the accuracy and overall performance of your Mossberg Pump Action Shotgun. Simple drop in upgrade for your Mossberg 500 Trigger Assembly! 

*** We recommend using the Mossberg 500 / 835 Trigger Assembly Tool ***

The Mossberg 500 / 835 Trigger Spring Kit is constructed of the highest quality spring steel available, ASTM A228 music wire and are made right here in the USA! 

Be advised that Mossberg uses the same trigger assembly in a majority of their shotguns and for this reason the M*CARBO Trigger Spring Kit will fit a variety of Mossberg Shotgun Models. 

The Mossberg 500/835 Trigger Spring Kit will work for the following Mossberg Model Shotguns: 500, 505, 535 ATS, 590, 835 Ulti-Mag, Don't forget it's a popular Maverick 88 Accessory.  This Trigger Spring Kit works for 12, 16, 20, 28 gauges.

Check out this episode of  TFBTV , with James Reeves running a  Mossberg Maverick 88  Torture Test with the M*CARBO Trigger Spring Kit Installed and Reviewed in Action with the Maverick!

This spring kit will reduce your trigger pull by nearly 50% from a factory weight of 8.5lbs to a modified 4.75lb trigger pull. Installation takes approximately 20-30 minutes to install. Backed by our M*CARBO No Hassle 100% Lifetime Guarantee!

***If you have a Mossberg 590, then you will need to remove both hammer springs that are in the Mossberg 590 Trigger Group from the Factory. There is an inner and outer hammer spring that fit inside one another. Then replace the 2 factory springs with the single M*CARBO Hammer Spring in this kit. We've thoroughly tested this to ensure it would be free from light strikes or discharges when dropped. Due to the Mossberg 590 being used by the Military, it includes 2 hammer springs from the factory to ensure it will ignite harder primers on military grade ammo. Unless you are shooting military grade ammo you will not experience any light strikes.***

                          

Q: Which Mossberg Shotguns will this kit work for?

A: The MCARBO Mossberg 500 / 835 Trigger Spring Kit will work for the following Mossberg Model Shotguns:500, 505, 535 ATS, 590, 590M, 835 Ulti-Mag.

Q: Which gauges will the Mossberg 500 / 835 Trigger Spring Kit work for?

A: 12, 16, 20, 28 GAUGES Only

Q: Do you recommend removing the smaller inner hammer spring in the 590A1, when replacing the larger hammer spring with the MCARBO hammer spring?

A: Yes we recommend removing both the smaller and larger hammer spring and replacing it with the M*CARBO hammer spring to get the lightest trigger pull possible.

Q: Should I be concerned with any malfunctions or light strikes after installing this kit?

A: No, all of our MCARBO Trigger Spring Kits have been professionally engineered, designed and manufactured to reduce trigger pull while maintaining 100% reliability of the firearm. You will not experience any sort of light strike or malfunction but you will experience a crisp smooth lighter trigger pull. Guaranteed or your Money Back!


Mossberg 500/835 Resources:

Use the following Mossberg 500/835 Resources to further enhance your firearm. Download the Mossberg 500/835 Owners Manual or use the Exploded View of the Mossberg 500/835 Parts Diagram to plan your next firearm project.

Mossberg Shotguns 500/835 Owner's Manual

Mossberg 500/835 Exploded View

Mossberg 500/835 Trigger Group Exploded View

M*CARBO No Hassle 100% Lifetime Guarantee:

The Mossberg Shotguns 500/835 and Maverick 88 Trigger Spring Kit is protected by the M*CARBO No Hassle 100% Lifetime Guarantee.

No Hassle 100% Lifetime Guarantee Ribbon

Drop Tested and Approved:

M*CARBO ASTM Spec Springs will offer a perfect trigger pull reduction with an unlimited drop test rating (3", 6", 9" & 12"+).

Drop Tested and Approved Icon

Range Tested and Approved:

The Mossberg 500 / 835 & Maverick 88 Trigger Spring Kit has been tested with numerous brands of ammunition to ensure reliable operation and safety.

Product Tested and Approved Sticker

Veteran Owned and Operated Business:

American Made Parts designed and manufactured by Combat Veterans. We 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. Installation by M*CARBO is available and recommended. Modifying your weapon may be prohibited in your state. Do not modify your sear or hammer engagement surfaces, with or without the Mossberg 500/835 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
review-star review-star review-star review-star review-star
I first heard of this company and product when I watched the TFB Maverick 88 torture test video and decided to give it a try.
I have 3 Mossbergs; 2 M835s and a Shockwave. The first 835's trigger pull was reduced from 5# to 4# . The other 835's trigger pull was reduced from 6 1/4# to 5#. The Shockwave's trigger pull was reduced from 6 1/2# to 4 1/2#.
This is about what I thought was realistically to be expected from a spring kit so I'm happy with the result.
review-star review-star review-star review-star review-star
My gunsmith highly recommended MCARBO products, so I purchased this product based on his recommendation. Installed this trigger kit on a Maverick 88. Prior to install the trigger pull was right at 8lbs, after install trigger pull was reduced to 5lbs. POU for this weapon is as primary home defense. For a self defense weapon I'm not sure I'd want to go much below a 5lb trigger pull. Works for me.
Maverick 88
review-star review-star review-star review-star review-star
Be careful on the 88, the disconnector spring is different and pops out when removing the trigger. The disconnector holds it in place when depressed. I also was not able to remove the disconnector because there was no clearance to wiggle it out. The trigger pin also holds the connector spring on the 88. It loops around the pin. Just look at it carefully before removal of the pin. Luckily I was able to figure it out but the video is a decent reference for how most of this goes together. As far a pull reduction, mine was very poor to start. I'm guessing it was close to 8lb.s and reduced it to 5 lbs. it was an improvement from the factory pull.
Best $20 for any Mossberg Shotgun
review-star review-star review-star review-star review-star
I installed this kit in two Mossberg 500s, a 12 and 20 gauge. The kit worked great in both. Installation following the video took maybe 10 minutes for the two. I didn’t measure the trigger pull difference from before/after installation, but it is a significant reduction in the trigger pull. The trigger pull on the 12 gauge isn’t so light that I worry for safety's sake when hunting turkeys. The reset is very crisp too. Do yourself and your shotgun a favor and get a kit, I would recommend this to anyone in a heartbeat.
Disappointed
review-star review-star review-star review-star review-star
I ordered a trigger spring kit for a Mossberg 500 and a Remington 870. Order # 526518. The measured trigger pull on the Mossberg 500 was about 6 1/4 lbs and about 6 lbs on the Reminton 870. After installing the kits the Mossberg measured 5 3/4 lbs and the Reminton measured about 5 1/2lbs. Your site stated the reduction in trigger pull would be about 50%, + or - 1lb. Very disappointing.
Worth the money!
review-star review-star review-star review-star review-star
My Mossberg 500 trigger was 9.9 lbs. when I bought it new. Installed the MCARBO trigger spring kit which took about 15 minutes watching the video and using the wood dowel hammer spring tool I also purchased and got my trigger down to 5-1/8 lbs. Much improved!
Trigger Spring installation on Mossberg 590a1
review-star review-star review-star review-star review-star
I installed The trigger springs on my shotgun. I think maybe you guys should dive into how you can work it on the 590A1. The 590A1 comes with an internal spring on the plunger. A demonstration running the weapon with and without the internal plunger spring by MCARBO would be interesting.
I kept the internal spring on. The the shotgun pumped a lot smoother and the trigger pull was very crisp and the dimple on the primer of the shotshell was, by the naked eye, the same as on shotshells fired by the factory springs.
The trigger weight was measured at a little over 7 pounds. This was measured 3 times at the range using a device that I cannot confirm the calibration of, but it averaged 7.24 lbs. the scale was not mine but from the bench at the range. The measurement was taken in between the tip and center of the trigger.

The wooden spring tool is not good. It was tight in the ID of the trigger housing, left debris and broke too easy. Look into Delrin. It is machineable.

I hope this helps
Semper Fi
Fantastic product
review-star review-star review-star review-star review-star
Love my new trigger squeeze. Not easy for clumsy hands like mine to replace, but the video definitely helped. My Maverick 88 is very happy.
Questions & Answers
0 0
Question:
Does the hammer spring sacrifice hammer striking power in order to get better trigger pull? , Thank you
May 27, 2022 10:55 AM
Answers
By Default, putting in a litter spring is going to have a liter strike. That being said our engineers designed it to still be strong enough to ignite the primer on a variety of brands.
Answered by
Kenneth Noble / June 7, 2022 7:44 AM
0 0
Question:
Will this work on a 90s model 500?
Davesim074 April 19, 2022 10:23 PM
Answers
Absolutely! This kit will work in all Mossberg 500 models
Answered by
Abby Marino / April 20, 2022 8:54 AM
0 0
Question:
Does it fit a 20 ga 500 ?
December 27, 2021 8:37 AM
Answers
We haven't tested it in a 20 ga here ourselves but have had feedback from other customers that they have received good results!
Answered by
Abby Marino / April 20, 2022 8:57 AM
0 0
Question:
Will the trigger spring kit for Mossberg %00 shotguns work on a 590A1?
LTalbot December 14, 2021 1:36 PM
Answers
Yes the kit will work
Answered by
waldo@mcarbo.com37647 / December 20, 2021 11:31 AM
0 0
Question:
Is this also compatable with the Mossberg 590 series pump shotguns???
check6otis December 1, 2021 8:39 AM
Answers
Designed for Mossberg Model Shotguns: 500, 505, 535 ATS, 590, 590M, 835 Ulti-Mag, Maverick 88
Answered by
waldo@mcarbo.com37647 / December 20, 2021 11:58 AM

About This Item

Mossberg 500 / 835 & Maverick 88 Trigger Spring Kit

  1. Custom Lighter Hammer Spring
  2. Custom Lighter Trigger Return Spring

The Mossberg 500 / 835 & Maverick 88 Trigger Spring Kit will reduce your trigger pull by nearly 50% from a factory weight of 8.5lbs to a modified weight of 4.75lbs. One of the Best Mossberg 500 Accessories available! The Mossberg Pump Action Shotgun Trigger Job will reduce malfunctions and improve the accuracy and overall performance of your Mossberg Pump Action Shotgun. Simple drop in upgrade for your Mossberg 500 Trigger Assembly! 

*** We recommend using the Mossberg 500 / 835 Trigger Assembly Tool ***

The Mossberg 500 / 835 Trigger Spring Kit is constructed of the highest quality spring steel available, ASTM A228 music wire and are made right here in the USA! 

Be advised that Mossberg uses the same trigger assembly in a majority of their shotguns and for this reason the M*CARBO Trigger Spring Kit will fit a variety of Mossberg Shotgun Models. 

The Mossberg 500/835 Trigger Spring Kit will work for the following Mossberg Model Shotguns: 500, 505, 535 ATS, 590, 835 Ulti-Mag, Don't forget it's a popular Maverick 88 Accessory.  This Trigger Spring Kit works for 12, 16, 20, 28 gauges.

Check out this episode of  TFBTV , with James Reeves running a  Mossberg Maverick 88  Torture Test with the M*CARBO Trigger Spring Kit Installed and Reviewed in Action with the Maverick!

This spring kit will reduce your trigger pull by nearly 50% from a factory weight of 8.5lbs to a modified 4.75lb trigger pull. Installation takes approximately 20-30 minutes to install. Backed by our M*CARBO No Hassle 100% Lifetime Guarantee!

***If you have a Mossberg 590, then you will need to remove both hammer springs that are in the Mossberg 590 Trigger Group from the Factory. There is an inner and outer hammer spring that fit inside one another. Then replace the 2 factory springs with the single M*CARBO Hammer Spring in this kit. We've thoroughly tested this to ensure it would be free from light strikes or discharges when dropped. Due to the Mossberg 590 being used by the Military, it includes 2 hammer springs from the factory to ensure it will ignite harder primers on military grade ammo. Unless you are shooting military grade ammo you will not experience any light strikes.***

                          

Q: Which Mossberg Shotguns will this kit work for?

A: The MCARBO Mossberg 500 / 835 Trigger Spring Kit will work for the following Mossberg Model Shotguns:500, 505, 535 ATS, 590, 590M, 835 Ulti-Mag.

Q: Which gauges will the Mossberg 500 / 835 Trigger Spring Kit work for?

A: 12, 16, 20, 28 GAUGES Only

Q: Do you recommend removing the smaller inner hammer spring in the 590A1, when replacing the larger hammer spring with the MCARBO hammer spring?

A: Yes we recommend removing both the smaller and larger hammer spring and replacing it with the M*CARBO hammer spring to get the lightest trigger pull possible.

Q: Should I be concerned with any malfunctions or light strikes after installing this kit?

A: No, all of our MCARBO Trigger Spring Kits have been professionally engineered, designed and manufactured to reduce trigger pull while maintaining 100% reliability of the firearm. You will not experience any sort of light strike or malfunction but you will experience a crisp smooth lighter trigger pull. Guaranteed or your Money Back!


Mossberg 500/835 Resources:

Use the following Mossberg 500/835 Resources to further enhance your firearm. Download the Mossberg 500/835 Owners Manual or use the Exploded View of the Mossberg 500/835 Parts Diagram to plan your next firearm project.

Mossberg Shotguns 500/835 Owner's Manual

Mossberg 500/835 Exploded View

Mossberg 500/835 Trigger Group Exploded View

M*CARBO No Hassle 100% Lifetime Guarantee:

The Mossberg Shotguns 500/835 and Maverick 88 Trigger Spring Kit is protected by the M*CARBO No Hassle 100% Lifetime Guarantee.

No Hassle 100% Lifetime Guarantee Ribbon

Drop Tested and Approved:

M*CARBO ASTM Spec Springs will offer a perfect trigger pull reduction with an unlimited drop test rating (3", 6", 9" & 12"+).

Drop Tested and Approved Icon

Range Tested and Approved:

The Mossberg 500 / 835 & Maverick 88 Trigger Spring Kit has been tested with numerous brands of ammunition to ensure reliable operation and safety.

Product Tested and Approved Sticker

Veteran Owned and Operated Business:

American Made Parts designed and manufactured by Combat Veterans. We 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. Installation by M*CARBO is available and recommended. Modifying your weapon may be prohibited in your state. Do not modify your sear or hammer engagement surfaces, with or without the Mossberg 500/835 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 (409)
review-star review-star review-star review-star review-star
4.89
review-star review-star review-star review-star review-star
I first heard of this company and product when I watched the TFB Maverick 88 torture test video and decided to give it a try.
I have 3 Mossbergs; 2 M835s and a Shockwave. The first 835's trigger pull was reduced from 5# to 4# . The other 835's trigger pull was reduced from 6 1/4# to 5#. The Shockwave's trigger pull was reduced from 6 1/2# to 4 1/2#.
This is about what I thought was realistically to be expected from a spring kit so I'm happy with the result.
review-star review-star review-star review-star review-star
My gunsmith highly recommended MCARBO products, so I purchased this product based on his recommendation. Installed this trigger kit on a Maverick 88. Prior to install the trigger pull was right at 8lbs, after install trigger pull was reduced to 5lbs. POU for this weapon is as primary home defense. For a self defense weapon I'm not sure I'd want to go much below a 5lb trigger pull. Works for me.
Maverick 88
review-star review-star review-star review-star review-star
Be careful on the 88, the disconnector spring is different and pops out when removing the trigger. The disconnector holds it in place when depressed. I also was not able to remove the disconnector because there was no clearance to wiggle it out. The trigger pin also holds the connector spring on the 88. It loops around the pin. Just look at it carefully before removal of the pin. Luckily I was able to figure it out but the video is a decent reference for how most of this goes together. As far a pull reduction, mine was very poor to start. I'm guessing it was close to 8lb.s and reduced it to 5 lbs. it was an improvement from the factory pull.
Best $20 for any Mossberg Shotgun
review-star review-star review-star review-star review-star
I installed this kit in two Mossberg 500s, a 12 and 20 gauge. The kit worked great in both. Installation following the video took maybe 10 minutes for the two. I didn’t measure the trigger pull difference from before/after installation, but it is a significant reduction in the trigger pull. The trigger pull on the 12 gauge isn’t so light that I worry for safety's sake when hunting turkeys. The reset is very crisp too. Do yourself and your shotgun a favor and get a kit, I would recommend this to anyone in a heartbeat.
Disappointed
review-star review-star review-star review-star review-star
I ordered a trigger spring kit for a Mossberg 500 and a Remington 870. Order # 526518. The measured trigger pull on the Mossberg 500 was about 6 1/4 lbs and about 6 lbs on the Reminton 870. After installing the kits the Mossberg measured 5 3/4 lbs and the Reminton measured about 5 1/2lbs. Your site stated the reduction in trigger pull would be about 50%, + or - 1lb. Very disappointing.
Worth the money!
review-star review-star review-star review-star review-star
My Mossberg 500 trigger was 9.9 lbs. when I bought it new. Installed the MCARBO trigger spring kit which took about 15 minutes watching the video and using the wood dowel hammer spring tool I also purchased and got my trigger down to 5-1/8 lbs. Much improved!
Trigger Spring installation on Mossberg 590a1
review-star review-star review-star review-star review-star
I installed The trigger springs on my shotgun. I think maybe you guys should dive into how you can work it on the 590A1. The 590A1 comes with an internal spring on the plunger. A demonstration running the weapon with and without the internal plunger spring by MCARBO would be interesting.
I kept the internal spring on. The the shotgun pumped a lot smoother and the trigger pull was very crisp and the dimple on the primer of the shotshell was, by the naked eye, the same as on shotshells fired by the factory springs.
The trigger weight was measured at a little over 7 pounds. This was measured 3 times at the range using a device that I cannot confirm the calibration of, but it averaged 7.24 lbs. the scale was not mine but from the bench at the range. The measurement was taken in between the tip and center of the trigger.

The wooden spring tool is not good. It was tight in the ID of the trigger housing, left debris and broke too easy. Look into Delrin. It is machineable.

I hope this helps
Semper Fi
Fantastic product
review-star review-star review-star review-star review-star
Love my new trigger squeeze. Not easy for clumsy hands like mine to replace, but the video definitely helped. My Maverick 88 is very happy.

Questions & Answers

5 Questions

0 0
Question:
Does the hammer spring sacrifice hammer striking power in order to get better trigger pull? , Thank you
May 27, 2022 10:55 AM
Answers
0 0
By Default, putting in a litter spring is going to have a liter strike. That being said our engineers designed it to still be strong enough to ignite the primer on a variety of brands.
Answered by
Kenneth Noble / June 7, 2022 7:44 AM
0 0
Question:
Will this work on a 90s model 500?
Davesim074 April 19, 2022 10:23 PM
Answers
0 0
Absolutely! This kit will work in all Mossberg 500 models
Answered by
Abby Marino / April 20, 2022 8:54 AM
0 0
Question:
Does it fit a 20 ga 500 ?
December 27, 2021 8:37 AM
Answers
0 0
We haven't tested it in a 20 ga here ourselves but have had feedback from other customers that they have received good results!
Answered by
Abby Marino / April 20, 2022 8:57 AM
0 0
Question:
Will the trigger spring kit for Mossberg %00 shotguns work on a 590A1?
LTalbot December 14, 2021 1:36 PM
Answers
0 0
Yes the kit will work
Answered by
waldo@mcarbo.com37647 / December 20, 2021 11:31 AM
0 0
Question:
Is this also compatable with the Mossberg 590 series pump shotguns???
check6otis December 1, 2021 8:39 AM
Answers
0 0
Designed for Mossberg Model Shotguns: 500, 505, 535 ATS, 590, 590M, 835 Ulti-Mag, Maverick 88
Answered by
waldo@mcarbo.com37647 / December 20, 2021 11:58 AM

Related Items: