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!
76 Reviews Hide Reviews Show Reviews
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Drop in FRT
I could not be happier. Im still smiling. I will certainly be a repeat customer.
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Assembled Kabuto drop in.
Great frt works great.
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Kabuto drop in FRT
This is by far the best bang for your buck FRT ever! So easy to install even a caveman like myself can do it. I've paired mine with a Dirty Bird reduced spring set and it's a beautiful thing! And the customer service is excellent as well!
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Badass.
Follow the instructions provided and you shouldn't have issues. Keep in mind, some tuning may still be required if running adjustable gas system. On my .300blk, when I function checked it, it worked, safe, semi and frt. Had issues cycling the next round but it was all gas related due to running suppressed. This thing absolutely fucks. Do yourself a favor and buy two. If you are worried about the carbon fiber body, don't be. All it does is hold the components together. Your lower receiver will protect it from any impacts.
