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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Great Company And Product
brother took care of me more then I could ever ask for A true friend and man of his word and integrity no doubt no bs.
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Easy install
Best of the 3 different FRats i have. So far no delays and no hangups! Running H3 buffer!
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Great product
Got the device delivered within a week. Slapped it in my psa 10.5. With a h2 buffer. Runs flawlessly. 40 rounds with light trigger pull and no wear so far.
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Kabuto FRT..drop in.
Ordered 2 , still trying to get it working in a Armilite AR 15..?? First one working good in my PSA AR 15..
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Great product
Came super fast and installed super easy no issues
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Works PERFECTLY
Ran smooth in my PSA lowers. No jams. Dumped 2 30rd mags with ease. Flips back to semi continues to operate.
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Great product.
Received the drop in and immediately had to try it out. Easy install. Had to sand down the large dowel pin for fitment. Ran flawless on a suppressed .300blk. Hope to see a metal selector in the future but will be purchasing more from this company.
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SS
Worked exactly how I thought it would! Highly recommend purchasing.
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Seems solid!
Fast shipping and great quality. Fits great in 2 Psa ars a mil sport and a Ruger. Mine has worked ok but extremely fast with a H1 buffer but it definitely needs a h2 or h3 to keep the rate under control and have zero issues. I will definitely be buying 1 for each!
