Works as advertised
LaRue Kabuto FRT — First Kabuto Cut for LaRue MBT 2-Stage Triggers | 316 Stainless Ambi
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Product reviews
LaRue Kabuto · CNC Aluminum Housing · Minimal Tuning · Fort Worth, Texas
Run a LaRue MBT? This is the assisted reset trigger built for you: the first Kabuto ever machined specifically for the LaRue MBT two-stage trigger. The bottom of the CNC machined 6061 aluminum housing is cut to mate with the MBT's machined S7 tool steel profile, so the forced reset device sits on your LaRue the way generic Kabutos never could.
No printed body. No laser-cut pieces. Minimal tuning. A 316 stainless steel, polished and bead-blasted 3-position ambidextrous selector, a bearing steel main pin, and every unit hand-assembled in Fort Worth, Texas by the same Texas shop that builds our Tex Kabuto. The highest-quality Kabuto made for the MBT, with no comparison on the market.
CNC 6061 Housing
LaRue MBT Cut
316 Stainless Ambi
Minimal Tuning
Why a LaRue-Specific Cut Matters
Generic Kabuto housings are shaped around mil-spec fire control groups. Drop one over an MBT's machined plate profile and you're into shimming, sanding, and hoping.
On this Kabuto, the underside of the housing is machined to the MBT's actual geometry and the activator is set for the MBT's reset. The machining does most of the work before it ever reaches your bench.
Minimal tuning, not zero. Every MBT and every lower vary by a few thousandths. Most units drop on and run. Some need a light touch on the activator to time the reset to your specific trigger. If yours does, it's a few minutes with a file, not a fitment session. Drop it onto your MBT-2S, function check it, and tune only if it asks for it.
Not running a LaRue? Mil-spec trigger shooters: the Tex Kabuto has the same metal body and drops in with no fitting. Want a machined metal selector in color? See the CNC Kabuto.
Geissele SSA owners: the Geissele-Ready Kabuto Package includes our SSA insert.
Built Like the Trigger It Sits On
You paid for a match-grade trigger. The device sitting on top of it should be machined to the same standard.
- CNC machined 6061 aluminum housing. The printed body is gone. Nothing to crack, nothing to flex.
- LaRue-specific housing cut. The first and only Kabuto machined to the MBT's profile.
- Fully CNC machined, not a single laser-cut piece. Not one piece of metal left rough or untouched.
- 316 stainless 3-position ambi selector, polished and bead-blasted. Crisp metal-on-metal detents between Safe, Semi, and Forced Reset.
- Bearing steel main pin.
- Polished, machined parts fitted by hand in Fort Worth. Not bagged parts, not a kit.
Specifications
| Trigger Type | Assisted reset / forced reset device (FRT), drop-in, Kabuto pattern |
|---|---|
| Housing | CNC machined 6061 aluminum |
| Housing Cut | Machined specifically for the LaRue MBT-2S two-stage trigger |
| Fitting | Minimal. Cut to the MBT profile; a light activator adjustment may be needed on some units to time the reset. |
| Selector | 316 stainless steel, 3-position, fully ambidextrous, polished and bead-blasted |
| Main Pin | Bearing steel |
| Construction | Fully CNC machined, zero laser-cut pieces, every surface finished |
| Assembly | Hand-assembled in Fort Worth, polished CNC'd parts throughout |
| Positions | Safe · Semi · Forced Reset (assisted reset) mode |
| Platform | AR-15 with LaRue MBT-2S installed (mil-spec .154" small-pin lowers) |
| Origin | Machined in Fort Worth, Texas, USA |
| Price | $134.99 |
The Kabuto Family
| Kabuto | Housing | Selector | Built for | Price |
|---|---|---|---|---|
| Tex Kabuto | CNC 6061 aluminum, no fitting | Stainless metal ambi | Mil-spec trigger, mil-spec or M16-cut lower | $119.99 |
| LaRue Kabuto (this one) | CNC 6061 aluminum, LaRue MBT cut, minimal tuning | 316 stainless ambi, polished & bead-blasted | LaRue MBT-2S | $134.99 |
| CNC Kabuto | Red anodized CNC 6061 | Machined metal, single-sided or ambi, 4 colors | Choosing your own selector and color | From $149.99 |
| Geissele-Ready Package | Kabuto + our SSA insert | Stainless metal ambi | Geissele SSA | From $149.99 |
Required Hardware
- LaRue MBT-2S installed. This Kabuto is cut for it and only it.
- M16-profile (full-auto cut) BCG required. We run the MPI Nickel Boron M16-Cut BCG ($159.99).
- Heavy buffer strongly recommended (H2 minimum, H3 preferred). Shop AR-15 buffers from $29.99.
- Full-power ammo and a dry-cycle function check before live fire. Install steps are in our installation guides.
Two Texas Legends, One Fire Control Group
LaRue builds the MBT in Texas. Our shop machines this Kabuto in Fort Worth. Put them together and you get a match-grade two-stage trigger with a forced reset device cut to its exact profile: metal housing, metal selector, minimal tuning. It's the setup we'd build for ourselves.
Comparing it against other forced reset triggers? See our best FRT triggers for the AR-15 buyer's guide.
Know your state laws. Some states restrict forced reset triggers. It is the buyer's responsibility to know and follow local law. See Are FRT Triggers Legal? for the current state-by-state breakdown. Install by a qualified individual familiar with the AR-15 platform.
Frequently Asked Questions
Does the LaRue Kabuto need tuning?
Minimal. The housing is machined to the MBT-2S profile and the activator is set for the MBT's reset, so most units drop on and run. Because every trigger and lower vary slightly, some units need a light activator adjustment to time the reset. Function check it first; tune only if it needs it.
Will this fit a mil-spec trigger or a Geissele?
No. This housing is cut for the LaRue MBT-2S only. Mil-spec trigger owners want the Tex Kabuto. Geissele SSA owners want the Geissele-Ready Package.
Do I still need a full-auto BCG and a heavy buffer?
Yes, like every FRT. M16-profile BCG is required; H2 buffer minimum, H3 preferred, never a solid buffer.
Is the LaRue Kabuto FRT legal?
Forced reset triggers are semi-automatic — one round per function of the trigger — and legal in most states, with restrictions in some. Check Are FRT Triggers Legal? before ordering.
Keep Exploring
State restrictions apply to forced reset triggers. It is the buyer's responsibility to understand and comply with all applicable local, state, and federal laws. Install by a qualified individual familiar with the AR-15 platform.