Assembled Kabuto Drop-In (Edited Version)
Kit includes
• 3D Printed Carbon Fiber Nylon Three Position Selector
• Assembled Steel Internal Activator and Lever with a 3D Printed Carbon Fiber Nylon Housing
Compatibility
This drop-in is designed only for the AR-15 platform — it will not work in a CMMG .22 or an AR-9, as those use different levers. Mil-spec triggers are the only triggers fully confirmed for compatibility at this time; your mil-spec trigger does not require modification and will work as-is once the unit is fitted correctly. Other trigger types may work but are untested.
The system has been successfully fitted to many popular AR-15 builds, including PSA, Aero Precision, Anderson, Daniel Defense, Core15, and DPMS. While these brands have been tested and do work, we cannot guarantee fitment in every rifle platform.
These require an M16 bolt carrier groups, and an H3 non-solid buffer weight to function as intended.
Installation & Fitment Notes
On the assembled version, there are two prongs on the drop-in that push both sides of the trigger to cause it to reset. If the part won’t fully seat during installation, the smaller prong on the right is usually contacting the disconnector. Gently bend that leg outward a small amount with pliers so it clears the disconnector, and the rifle will close. This feature is intentional — the design prevents the unit from being modified or functioning like a DIAS.
Break-in & Finish
These are raw parts. Normally, cycling and dry-firing the unit 10–20 times in both modes helps wear off any rough edges, allowing the parts to better mate with your rifle’s tolerances. If you prefer not to cycle/dry-fire, the bottom of the lever may require light polishing. Each lever is tumbled in a deburring/polishing media before shipping.
Buffer Requirement
A heavier buffer weight (H2–H3) is required — do not use a solid buffer.
Safety / Use
Remember: this is an FRT. Do not hold the trigger down like a full-auto — doing so will cause premature wear and may ruin the drop-in.
Shipping & Checkout
Please allow 1-3 days for assembly time. Also, please double-check your shipping information before checkout!
107 Reviews Hide Reviews Show Reviews
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Kabuto Works Great No Issues
Best Purchase of 2025
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great
Works very good supper job and thank you for a great product. And God bless you and your family and have a very very blessed marry Christmas
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Kabuto Drop in
Works as it should , this is a true drop in super easy install . If you’re having trouble Poor Boy Arms on YouTube made a few videos breaking every thing down .
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Kabuto frt
Haven't had a chance to try it out yet but as far as costumer care goes this is a five star company. They delivered very fast and are also very fluent in letting you know about your purchase throughout its entire journey from them until it is dropped off to you. With it being Christmas time I was surprised to get anything without problems and as fast as I did. I'm sure the product will work as well as it was delivered.
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Working great I used a super 42 with a h2 buffer running like a sewing machine
Running like a sewing machine
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It works in Radical Receivers!
This was amazingly simple to use and worked from the first round! Nice.
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Super Safety AR15 Trigger
This thing is sweet. Only fired 60 rounds using it so far, but had zero issues and it ran like butter.
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Drop In
Well built and fun !
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Drop in trigger
Great product, works well with a little modification to my lower, runs flawlessly.
