AR-15 Trigger Spring Kit

Consists of a custom designed and manufactured Hammer Spring

The AR-15 Trigger Spring Kit will reduce your trigger pull from a factory weight of 6lbs to a modified weight of 4.5lbs. 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.

M*CARBO No Hassle 100% Lifetime Guarantee:

The AR-15 Trigger Spring Kit is protected by the M*CARBO No Hassle 100% Lifetime Guarantee.

M*CARBO Lifetime Guarantee

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"+).


Range 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 AR-15 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

Overall Customer Rating of 218 Reviews:
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AR Spring kit

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The Spring does exactly what is advertised. The install videos are helpful as well. Not to mention the follow up emails for receipt of product. This is a company worth supporting & doing
business with.

M-4 trigger spring

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I received the MCARBO replacement spring for my Colt M+4 yesterday, installation took about 15 minutes and working with the MCARBO utube video playing made the install seem smooth and effortless.

The proof of how well the spring works is in the attached photo of the after install reading on my Wheeler digital trigger pull gauge. Before the install, the reading with the factory trigger spring was 6.13.3.

Thanks MCARBO!
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Easy Install for a novice - Great Results

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Installing was a breeze with Chris's instruction video. Best $13 bucks you'll spend on your rifle!

Illinois

Upgrade

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Wow, did this upgrade with my kiddo and what a difference we both noticed. He did it all and I supervised. He watched the videos and then completed the upgrade. This gave us the confidence to do the Glock trigger spring kit. Great service, product(s) and video(s).

AR trigger kit

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Very easy to install, trigger pull is easier and smoother than the OEM

Number of questions: 0