- The M*CARBO AR-15 Trigger Spring Kit is designed to reduce your trigger pull from a stock ~6lbs to a modified ~4.5lbs
(Average results can vary up to +/- 1lb)
- Enhances accuracy and tightens shot groups.
- Features a 15% lighter custom hammer spring and a 40% lighter custom trigger spring for optimal performance.
- Recognized as one of the best AR-15 trigger upgrade kits available.
- Ensures proper functionality with all brands of civilian ammunition as well as military green tip 5.56 ammo.
- Manufactured from the highest quality American Spring Steel, ASTM A228 Music Wire, guaranteeing durability.
- Protected by the M*CARBO 100%
Lifetime Guarantee
- Made in the USA!
- Fast
Same Day Shipping!
WHAT'S IN THE KIT:
- 1 - Custom Lighter Hammer Spring
- 1 - Custom Lighter Trigger Spring
*Note: The installation video currently only covers the hammer spring installation. A new video is in the works and will be available soon.
AR-15 Trigger Spring Kit
Upgrade the performance of your AR-15 with our AR-15 Trigger Spring Kit - the best AR 15 trigger upgrade kit on the market.
Made from the highest quality American Spring Steel ASTM A228 Music Wire, this kit will reduce your trigger pull weight from a stock ~6lbs to a modified weight of ~4.5lbs (average results can vary up to +/- 1lb), providing improved accuracy and tighter shot groups.
This kit includes a 15% lighter custom hammer spring and a 40% lighter custom trigger spring, designed to improve your trigger pull weight without compromising the reliability of your firearm. The AR-15 Trigger Spring Kit will properly function with all brands of Civilian ammo as well as Military green tip 5.56 ammo, making it a versatile and reliable choice for any shooter.
This kit ensures reduced malfunctions and consistent performance. With the M*CARBO AR-15 Trigger Kit, you can expect an excellent AR 15 trigger pull weight reduction, which will significantly improve your shooting experience.
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.
Drop Tested and Approved:
AR-15 Trigger Spring Kit is drop Tested according to SAAMI Standard Z299.5 rating (12" & 48").
Tested and Approved:
The AR-15 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 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.
The mcarbo AR-15 Trigger Spring Kit works!!
I have the mcarbo trigger spring kit in all my full size ARs and AR pistols.
This is my latest AR pistol, factory spring reading of 7 pounds 1.8 oz, then 4 pounds, 4.9 oz after the mcarbo trigger spring kit was installed.
The pictures speak for themselves.
Light Strikes
I have purchased 3 spring kits. One for a Savage 62, and Two for AR-15's. Rating the Savage, it is hands down a 5 star rating. Nice clean trigger break, and much lighter trigger pull. Well worth the investment. Now for the AR's. I wish I had the same report, but I do not. I will be putting the original hammer spring back. I am running near a 20% failure to fire rate since I started using the M*Carbo spring. The following primers have fail to work: 1) factory loads from PMC and Winchester. 2) CCI 400 primers, and Winchester small mag rifle #41. I have to give these sets a one star rating. An 1 in 6 fail rate is not acceptable.
2 lb recuction.
The spring kit dropped my PSA lower's trigger from 7lbs to a 5lb pull. Easy to install. Very happy.
Trigger and hammer springs
Very easy installation and right off the bat I could my trigger was lighter with out even measuring my trigger pull. I went to the rang and used different variety of ammo and it held up like a champ
Worth every penny
Shipping was fast and installation is easy. Night and day feeling after installing.
Doesn't work on Ruger AR556
Hate giving 1 star because it sounds like you're ticked off - I'm not. But I installed this in my Ruger AR556 and it made zero difference. The hammer spring has one less coil, so not sure why. Have already done the paracord break-in routine plus have over 2600 rounds through this gun, so the trigger should be well broken in. I don't know, seems like it should have worked. I'm open to suggestions, especially if you have a Ruger AR556 and it worked in your gun.
Ar 15 spring kit
Great little kit. Easy install. Can't ask for anything else. Thank you again.
Will this kit work with 6.5 Creedmoor Ammunition Primers?
Yes it will function properly on 6.5 Creedmoor Ammunition Primers
Hi, does this would fit in my kodiak defence wk180c gen2?
This part will function in any mil spec trigger group.
Will this spring kit work in my DB9R
Yes the Fire Control Group is the standard AR15 Trigger Group in the DB9R, so this spring will fit and function properly! :)
will this work in an ar15. 7.62x39 with steel cased ammo...known for light primer strikes.?
matt p February 28, 2022 4:00 PM
As long as you have a standard AR15 Fire Control Group the spring will fit and will work properly, but it will not resolve an already-prevalent light primer strike issue. We do extensive testing with our springs with MIL-SPEC brass casings but cannot recommend steel-cased ammo for regular shooting unless it's a last resort, due to the wear and damage it can cause to your barrel over time.
Will this Kit work on M&P AR15-22?
February 28, 2022 11:03 AM
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.
I have an AR 15 lower with a 450 bushmaster lower, will this spring work? Thank you.
As long as it is a standard AR15 Fire Control Group this spring will work!
Will this work on a Db Ar10
Yes! The Diamondback AR10 still has the same hammer set-up, which means our Hammer Spring is compatible
will it work on Ar 15 pistol ?
Yes as long is a normal AR-15 hammer will work on your firearm
Yes as long is a normal AR-15 hammer will work on your firearm
Yes as long is a normal AR-15 hammer will work on your firearm
Yes as long is a normal AR-15 hammer will work on your firearm