• Reduce your trigger pull by a minimum of 25%
  • Install a Trigger Return Spring for Smoother Trigger Operation
  • Improve accuracy and overall rifle performance
  • Protect aginst Light Primer Strikes with HD Firing Pin Spring
  • Protected by the M*CARBO 100% Lifetime Guarantee
  • Made in the USA!
  • Fast Same Day Shipping!

Mosin Nagant 91/30 Trigger Spring Kit

  • Custom Trigger Return Spring
  • Custom Sear Spring Shims (2 x .011)
  • Custom Trigger Shims (2 x .016)
  • Heavy Duty Firing Pin Spring
  • 550 Cord Gut (Installation Tool)
  • Synthetic Grease w/ PTFE
  • 1000 Grit Silicon Carbide Paper (3" x 3")

One of the Best Mosin Nagant Mods you can make to improve function and reliability not to mention Reduce the Trigger Pull on your Mosin Nagant Trigger!

Most complete Mosin Nagant Trigger Job available by request from the M*CARBO Brotherhood! Fits and functions in all variations of the Mosin Nagant 91/30. Most complete Mosin Nagant Parts Kit to improved the function and reliability of your Mosin. More Mosin Nagant Accessories available upon request!

This is one of the more important Mosin Nagant Mods you can make to reduce light strikes and provide a cleaner, smoother trigger pull. The Original Mosin Nagant Trigger has a very heavy inconsistent trigger pull but with the Mosin Nagant 91/30 Trigger Spring Kit you can expect to reduce your trigger pull by 25% and improve the overall function of the Mosin Nagant Trigger Assembly.

Best Mosin Nagant Upgrades for the all around performance and reliability enhancement gained in the process. Make sure your Mosin Nagant Trigger is updated and reliable with the 21st Century Mosin Nagant Trigger Job!

Most of the internal parts on the Mosin Nagant were mass produced over 100 years ago with less than precise manufacturing methods. Use the Polishing Kit to remove machining marks and burrs on metal surfaces that interact with one another. While your at it we highly recommend polishing the internal components with the M*CARBO Firearm Polishing Kit!

It's likely the crown could use some finishing on the muzzle of the barrel on your Mosin Nagant. Remove any burrs on the muzzle of the barrel of your Mosin Nagant with our Brass 45 degree Lapping Tool. We highly recommend lapping the crown of the muzzle on the Mosin with the Muzzle Lapping Kit!

Mosin Nagant 91/30 Owners Manual & Exploded View:

If your doing a tune up on your Mosin Nagant with the Mosin Nagant M91/30 Trigger Spring Kit, then you might find the following Mosin Nagant M91/30 Resources useful in further enhancing your firearm. Download the Mosin Nagant M91/30 Owners Manual or use the Exploded View of the Mosin Nagant M91/30 Parts Diagram to plan your next firearm project. Print or Download the Mosin Nagant M91/30Trigger Spring Kit Instructions by M*CARBO.

M*CARBO No Hassle 100% Lifetime Guarantee:

The Mosin Nagant 91/30 Trigger Spring Kit is protected by the M*CARBO No Hassle 100% 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 Mosin Nagant 91/30 Trigger Spring Kit has been tested repeatedly with numerous brands of ammunition to ensure reliable operation and safety.

Veteran Owned and Operated Business:

American made Mosin Nagant 91/30 Trigger Spring Kit designed and manufactured by Combat Veterans. We will donate a portion of your purchase to the Military Foundations we humbly support.


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 Mosin Nagant 91/30 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.

Overall Customer Rating of 24 Reviews:

Trigger pull BIG Improvment

I have recently purchased from you a trigger kit for my Ruger Mini 14, was fantastic!, so I purchased a kit for my Mosin, after polish sear and surface on bolt, like video instructed, works great, only gripe i have is the trigger return spring need a lil tweak or redesigned, but happy with product.


Mowing trigger kit.. works!

Finally got to install the Morin trigger kit, did the trigger job as instructed in the MCARBO video at the same time. Major difference on my 1934 Tula Hex Mosin Nagant. Minor issue with a part from the Kit- Chris & Team responded fast and shipped new part fast. Can’t say enough great things about MCARBO. Just recently stumbled onto them and have both Roger SP 101 & Mosin kits now- both made a huge difference- need the KelTec PLR-16 next😎

Mosin Nagant 91/30 Trigger Spring Kit

I have to Mosin Nagants, both original with all matching S/N#'s, so I was a little apprehensive about modifying their originality, however the trigger's on both were terrible so I decided to try one of your kit's. The result was just short of miraculous. After shimming the sear, polishing the sear and bold and shimming the side play in the trigger which took .0032 in shims the result was a shorter take up crystal break and a reduction from 7 lbs. 14 oz. before to a 5 pull average of 3 lbs. 4.5 oz as measured with a Lyman digital trigger pull scale. I did file a slight groove in the top left corner of the trigger fork which now retains the trigger spring without it moving around as reported in some of your reviews,. All in all it is a terrific improvement and I thank you guy's one more time for your excellent research in providing some of the less than main stream products unavailable to the public previously.

Worked as promised

Used the kit while following their youtube video on how to sand and polish the seer, as well as the install of the return spring. I have no way of measuring before and after trigger pull, but the trigger does now make my 1943 91/30 feel like a modern day rifle. Well worth the small cost of this kit and about 45 minutes of work.

North Carolina


Delivered decent timeframe ordered 3 times so far.
Improvement is great