KEL-TEC RDB Trigger Spring Kit

  • Consists of a custom designed and manufactured RDB Trigger Return Spring

The KEL-TEC RDB Trigger Spring will reduce your trigger pull from a factory 4.75-5.5 lbs to a modified 2.5 lbs. Best KEL TEC RDB Trigger Available! M*CARBO now offers the KEL-TEC RDB Trigger Adjustment Solution that has been highly reviewed and acclaimed as one of the Best KEL-TEC RDB Accessories on the market!

Custom KEL TEC RDB Aftermarket Parts designed to improve your accuracy and tighten shot groups. This is the most effective was to upgrade the KEL TEC RDB Trigger! Watch any KEL TEC RDB Review and you will hear most of them complain about the heavy factory trigger. Your KEL TEC RDB Accessories should included a Reduced Trigger Pull Solution for your KEL TEC RDB Trigger!

Improve the KEL TEC RDB Accuracy by giving the Shooter a proper trigger pull. Best KEL TEC RDB Trigger Upgrade for the money and way less expensive than any other option. M*CARBO Custom KEL TEC RDB Aftermarket Parts made in America and come with a 100% Lifetime Guarantee! One of the Best KEL-TEC RDB Accessories for improving the KEL TEC RDB Accuracy and KEL-TEC RDB Trigger.

All KEL TEC RDB Custom options to improve RDB Performance and Accuracy! Best KEL TEC RDB Aftermarket Parts to Reduce Trigger Pull by 40% in less than 15 minutes! M*CARBO is your only Official KEL TEC RDB Aftermarket Parts and Accessories Supplier!

KEL-TEC RDB Owners Manual & Exploded View:

If your doing the KEL-TEC RDB Trigger Job, then you might find the following KEL-TEC RDB Resources useful in further enhancing your firearm with KEL TEC RDB Aftermarket Parts. Download the KEL-TEC RDB Owners Manual or use the Exploded View of the KEL-TEC RDB Parts Diagram to plan your next firearm project.

No Hassle 100% Lifetime Guarantee on Parts & Accessories:

The KEL-TEC RDB Trigger Spring Kit is protected by the M*CARBO No Hassle 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. We even pay return shipping and automate the return process here!

Drop Tested and Approved:

KEL-TEC RDB Trigger Spring Kit is an M*CARBO ASTM Spec Spring that will offer a perfect trigger pull reduction with an unlimited drop test rating (3", 6", 9" & 12"+).

Range Tested and Approved:

The KEL-TEC RDB Trigger Spring Kit have been tested repeatedly with numerous brands of ammunition to ensure reliable operation and safety.

Veteran Owned and Operated Business:

American made KEL TEC RDB Aftermarket Parts 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 KEL TEC RDB Aftermarket Parts. 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:

I couldn't get the pins out of my rifle so I don't know

I took the RDB to a two gunsmiths and neither could get the RDB apart. Maybe it is just mine. The kit arrived fast and looked great, but I can't speak on it unfortunately. (I really wanted it too.) I'll assume it was perfect

Rdb spring

Good way to make a great trigger even better. I watched the videos on how to install the spring and to install, you actually have to completely split the lower reciever body. I decided to get around removing the roll pin from the bolt release. So I took out the screws from the trigger guard back to the bolt release and actually split apart just the front half of the lower. Kinda tricky getting the spring and guide rod back seated but I did everything in 5 minutes.


Buy it

Best affordable purchase you can make for your rdb. I referenced the install video which was great. I did not follow exactly. I did not remove the bolt release buttons. I also didn't fully seperate as I was able to sneak in through the trigger guard area with a small needle nose. This prevented any misalignment struggles that I might have encountered. Overall fantastic video and simple effective product. Will definitely use mcarbo in the future. Please keep the upgrades coming for the rdb!


The reviews don't lie!

The best Bullpup trigger just got better! I was skeptical that a product only had 5 star reviews, but figured for $13 what do I have to lose? My RDB went from a 5.2lb to a 2lb trigger pull. Over a 60% reduction. YMMV, but I am more than satisfied! My RDB finally feels like the mid/high-end gun I paid the money to get.

Kyiv, Ukraine

Nice upgrade

This spring gave a noticeable improvement to RDB's trigger pull. Awesome improvement for a low price.
Installation instructions video was very informative. Only thing in the video I did not see was how mag release button was removed. It did not cause a problem, it was easy to figure out.

Still trigger-pull is not perfect because of long take-up, which cannot be fixed by spring replacement. Would be nice to find some sort of gizmo to make take-up shorter. Perhaps the trigger bar itself could be replaced by a different one with a smaller 'hole' for sear engagement.