What AR-15 lowers is the NSPEC Kubota compatible with?

The Kubota is designed for AR-15 pocket-cut lowers only. It will not fit CMMG .22 or AR-9 lowers. It has been tested successfully with PSA, Aero Precision, Anderson, Daniel Defense, Core15, and DPMS lowers — but fitment can vary between manufacturers. No modifications are needed to a mil-spec trigger pocket once the unit is properly fitted.

What BCG and buffer does the Kubota require?

The Kubota requires an M16-profile bolt carrier group and an H2 or H3 non-solid buffer. Solid buffers will not work. An H3 is recommended for most builds. The same buffer requirements that apply to other forced reset triggers on the market apply here.

Is the Kubota a true drop-in forced reset trigger?

Yes. The Kubota is a true drop-in FRT for most AR-15 pocket-cut lowers. As with every forced reset trigger currently on the market, slight fitment adjustments may be required depending on your specific lower. If the unit won't seat, the right-side reset prong may be contacting the disconnector — gently bend it outward with pliers for clearance.

Where is the NSPEC Innovations Kubota made?

The Kubota is made in Texas by NSPEC Innovations — the same Texas-based manufacturer behind the NSPEC 10/22 FRT.

How do I hold the trigger on the Kubota?

Hold the trigger right at the break point, the same way you would with any other AR-15 forced reset trigger. Do not over-stage or short-stroke the pull.

NSPEC Innovations Kubota Drop-In FRT — AR-15

$139.99

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Overview

The NSPEC Innovations Kubota is a compact, fully assembled drop-in forced reset trigger built for AR-15 pocket-cut lowers. Steel internals paired with carbon fiber nylon components deliver a strong, lightweight setup at a price point that makes forced reset trigger performance accessible to every AR-15 builder. Fully assembled and ready to install out of the box.

Made in Texas by NSPEC Innovations — the same manufacturer behind the NSPEC 10/22 FRT. At $139.99 it is one of the most affordable forced reset triggers on the market without sacrificing the core FRT function that makes these triggers so sought after.

⭐ Made in Texas by NSPEC Innovations

Installation video: Watch the full Kubota install walkthrough before starting. NSPEC has produced a dedicated installation guide — watch here. An additional helpful video is also available here — note it is filmed on an AR-9 but the FRT function principles apply directly.

What's Included

Carbon Fiber Nylon 3-Position Selector
Assembled Steel Activator & Lever with mini CF Nylon Housing
Fully assembled — ready to install

Specifications

Product	Kubota Drop-In Forced Reset Trigger
Manufacturer	NSPEC Innovations — Texas, USA
Type	3-Position Drop-In FRT
Internals	Durable steel activator & lever
Housing	Carbon fiber nylon — lightweight, high-strength
Selector	Carbon Fiber Nylon 3-Position Selector
Platform	AR-15 — pocket-cut lowers only
BCG Required	M16-profile bolt carrier group — required
Buffer Required	H2 or H3 non-solid buffer — required. No solid buffers.
Tested Lowers	PSA, Aero Precision, Anderson, Daniel Defense, Core15, DPMS
Not Compatible	CMMG .22 · AR-9 lowers
Break-In	10–20 dry-fire cycles or light polish on lever bottom
Origin	Made in Texas, USA
Price	$139.99

Compatibility

The Kubota is designed exclusively for AR-15 pocket-cut lowers. It has been confirmed compatible with mil-spec trigger pockets — no modifications needed once properly fitted.

✓ PSA lowers
✓ Aero Precision lowers
✓ Anderson lowers
✓ Daniel Defense lowers
✓ Core15 lowers
✓ DPMS lowers
✗ Will NOT fit CMMG .22 lowers
✗ Will NOT fit AR-9 lowers

Fitment can vary between lower manufacturers. As with every forced reset trigger currently on the market, slight adjustments may be required for your specific lower. This is normal and not a defect.

Required Hardware

M16-profile BCG — required. Shop our MPI Nickel Boron M16 BCG ($159.99)
H2 or H3 non-solid buffer — required. No solid buffers. Shop Armaspec SMB H3 ($59.99) · Shop Odin Works HFRT ($79.99)

Install Notes

The Kubota is a true drop-in system for most AR-15 pocket-cut lowers. A few things to know before you install:

If the unit won't seat fully, the right-side reset prong may be contacting the disconnector — gently bend it outward with pliers for clearance. This design feature prevents DIAS-style modification.
If you experience binding, material can be carefully removed from the actuator to resolve it.
Slight fitment adjustments may be required depending on your specific lower — this is normal for any forced reset trigger.

⚠ Do not use solid buffers. H2 or H3 non-solid buffer required. Solid buffers will prevent correct FRT function.

Break-In

The Kubota ships as raw parts. Before live fire, cycle and dry-fire the unit 10–20 times to smooth operation. You can also lightly polish the lever bottom if preferred. This break-in process is standard for any new forced reset trigger and ensures reliable function from your first range session.

Trigger Technique

Hold the trigger right at the break point — the same technique used with any other AR-15 forced reset trigger. Do not over-stage, short-stroke, or hold the trigger fully rearward between shots. The FRT reset requires the trigger to return forward after each cycle. Let the trigger do its job.

Install Videos

NSPEC Innovations Kubota — Official Install Guide · YouTube

Additional reference video — filmed on AR-9 but FRT principles apply directly · YouTube

Related Products & Resources

FRT Resources

Product reviews

Specs of The AR-TT

The AR-Takedown Tool (AR-TT)

- weight is only 58 grams, under 3oz

-Length: 6 5/16"

-Diameter 1/2"

-This is the ONLY USA made gun smithing tool, gun cleaning tool, building tool, disable tool on the market.

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NSPEC Innovations Kubota Drop-In FRT — AR-15