Best AR-15 Trigger Spring Upgrade Kit

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  • Reduce your trigger pull from a stock 6 lbs to a modified 4.5 lbs
  • Improve accuracy and overall rifle performance
  • Kit includes a Custom Hammer Spring
  • Best AR 15 Trigger Upgrade Kit
  • Made of the highest quality 302 Stainless Steel Spring Wire
  • Protected by the MCARBO 100% Lifetime Guarantee
  • Made in the USA
  • Fast Same Day Shipping!

AR-15 Trigger Spring Kit

  • Consists of a custom designed and manufactured:
  1. Hammer Spring

The AR-15 Trigger Spring Kit will reduce your trigger pull from a factory weight of 6 lbs to a modified weight of 4.5 lbs. Your Trigger will properly function with all brands of Civilian ammo as well as Military green tip 5.56 ammo. This Kit is made of the highest quality spring steel available, right here in the USA. The AR-15 Trigger Spring Kit will improve your accuracy and tighten your shot groups. Reduced malfunctions should be expected because the trigger spring kit is constructed of the highest quality 302 stainless spring steel. The M*CARBO AR-15 Trigger Spring Kit was designed and tested to properly function with all brands of civilian and military grade ammunition. Expect an excellent AR 15 trigger pull weight reduction without compromising the reliability of your firearm.

AR-15 Resources:

Use the following AR-15 Resources to further enhance your firearm. Download the Official Army Training Manual. Use the different Exploded Views of the AR-15 Parts Diagram to plan your next firearm project. Print or Download any of the AR-15 Resources.

No Hassle 100% Lifetime Guarantee:

The AR-15 Trigger Spring Kit is protected by the M*CARBO 100% Lifetime Guarantee. This means that at any time you can send it back and we will exchange it, issue a refund or assist you in any way possible.


Tested and Approved:

The AR-15 Trigger Spring Kit has been tested with numerous brands of civilian and military grade ammunition to ensure reliable operation and safety.


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.


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 AR-15 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.

Q: Will this kit work for my AR15-22 M&P Rifle?

A: Yes it will since the lower receiver of the 22 caliber M&P Rifle measures to the same functional specs of the 5.56mm AR-15 lower receiver. The MCARBO Spring kit has also been tested in the M&P15-22 Rifle to ensure reliable and safe operation.

Q: Will this kit work with 6.5 Creedmoor Ammunition Primers?

A: Yes it will function properly on 6.5 Creedmoor Ammunition Primers

MCARBO 100% Lifetime Guarantee - This means that at any time you can send it back and we will exchange it, issue a refund or assist you in any way possible.

ATTENTION: We advise that all parts purchased from our inventory be installed and inspected by a qualified gunsmith. Modifying your weapon my be prohibited in your state. 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 my be incurred.

Overall Customer Rating of 55 Reviews:
Alberta, Canada

Great Results

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Hey Folks,



Have a stock Bushmaster XM-15 E2S with factory trigger pull measured by my gauge at an average of 7.6lb and ranging from 7.4-8.0lb. After installing this spring my pull weight is down to a 6.6lb average with range from 6.3 to 6.9lb. (Tried each 7 times).



I also applied the Synthetic Grease with PTFE to the hammer and sear during the trigger install.



So my trigger pull reduction is about 1lb, but also very noticeable is a much cleaner and more crisp break of the trigger that I am very happy with.



This is the second trigger spring kit I have ordered from M*Carbo (the first being for a Savage AXIS) and I have been very pleased both times with the results for the price. The customer service also continues to be exceptional.



Thanks MCarbo!



Chris

No-Brainer

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This is 2nd AR spring kit I have purchased from Mcarbo. They are light crisp and smooth all with 1 spring. 18$ shipped vs 150 - 300. No-Brainer

AR Trigger Spring Upgrade

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Without a gauge I can only guess at the pull weight, which is lighter to be sure, but the big difference was the crisp break and reliability. Full disclosure moment: I did take the time to polish the trigger surfaces before reinstalling. Very satisfied with the results.

Heck of a lot cheaper than a whole new trigger

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I put these on all of my AR's. I cannot justify spending 200+ more $'s on a whole new custom trigger. This spring makes a world of difference compared to the OEM spring. I have not had a failure yet. Works on standard and magnum primers. MCARBO rocks!

Virginia

AR-15 Trigger Spring Kit

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What a difference this spring kit made on my DPMS Rifle, trigger pull is so much better and smoother, the install was easy with no problems just watched the video everything went perfect, the shipping was super fast, Thank You MCARBO keep up the great work.