What if my rifle has a heavier buffer already?

If your rifle already has an H2 or H3 buffer installed, you can run the K-SPEC with it — but you don't need to. The K-SPEC is designed to work with a standard 3oz carbine buffer. If you experience over-buffering (short-stroking, failure to lock back), drop to the standard buffer.

Is everything in this combo made in the USA?

Yes. The Ambi Disruptor is manufactured by The Triggered Company in the USA. The KAK K-SPEC BCG is machined entirely in-house at KAK Industry's Missouri facility. 100% USA made.

Ambi Disruptor FRT + KAK K-SPEC BCG Combo — No Buffer Upgrade Required | Black or Green

Q: Why doesn't this combo include a buffer?

Because it doesn't need one. The KAK K-SPEC BCG contains a patented floating dead-blow weight in the carrier tail (US Patent 12,474,132 B2) that eliminates bolt bounce mechanically — inside the BCG itself. That's what an H2 or H3 buffer is normally doing for an FRT. With the K-SPEC, the standard 3oz carbine buffer that came in your rifle already provides the correct timing. Two components instead of three. Nothing to tune.

Q: What is the Ambi Disruptor?

The Ambi Disruptor is The Triggered Company's ambidextrous version of the Partisan Disruptor FRT — the same patented drop-in cassette forced reset trigger with a bilateral selector for left or right hand operation. Same 3-position function (Safe / Semi / Enhanced Semi), same 17-4 stainless and 4140 chromoly construction, same ~1,150 RPM cyclic rate. Available in Black or Green.

Q: Has the KAK K-SPEC been tested with the Disruptor?

KAK Industry tested the K-SPEC with the Hoffman Tactical Super Safety, AS Designs ARC-Fire, Atrius Development FRS, and Rare Breed FRT as part of the patent development process. The Disruptor uses the same forced reset principle as the Rare Breed FRT — KAK states similarly designed systems should work. As with all FRT builds, individual rifles may require fine-tuning, but the K-SPEC removes the buffer weight variable from that equation entirely.

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Authorized Dealer · Ambi Disruptor FRT · KAK K-SPEC BCG · No Buffer Required · Black or Green · 100% USA Made

The Ambi Disruptor + KAK K-SPEC Combo is the first FRT kit that doesn't need a buffer upgrade. Two components. The ambidextrous Partisan Disruptor and the KAK Industry K-SPEC BCG — the first bolt carrier group ever engineered specifically for forced reset triggers. Drop both in, keep the standard 3oz buffer that's already in your rifle, and run. No H2. No H3. No tuning.

Why There's No Buffer in This Combo

Every FRT combo on the market ships with a heavy buffer because every FRT needs one — the extra weight slows the bolt enough for the reset mechanism to engage. Get the weight wrong and the trigger doesn't reset. FRT builders spend hours chasing buffer weight, spring rate, and gas.

The KAK K-SPEC does that job inside the BCG. A patented floating weight in the carrier tail creates a dead-blow effect that kills bolt bounce mechanically — the exact thing an H2 or H3 buffer is trying to do from the other end. With the K-SPEC, your stock 3oz carbine buffer already provides correct timing. Patent US 12,474,132 B2.

Two parts instead of three. The simplest FRT install we sell.

This Combo vs. a Standard 3-Piece FRT Combo

✓ This Combo

2

Ambi Disruptor + KAK K-SPEC BCG. Keep your stock buffer. Drop in, done. Buffer weight eliminated as a variable.

Standard FRT Combo

3

Disruptor + M16 BCG + H2 or H3 buffer. Works great — but you're picking a buffer weight, and if your rifle runs different than expected, you're tuning.

✓ Federally Legal — May 2025 DOJ Settlement

Federally legal following Garland v. Cargill and the DOJ settlement. No NFA tax stamp required. State restrictions apply — we verify compliance on every order and do not ship to restricted states.

Save vs Buying Separately

Ambi Disruptor $325.00 + KAK K-SPEC BCG $199.99 = $524.99. Bundled at $479.99 — save $45. Best authorized dealer price online.

Choose Your Trigger Color

Black Ambi Disruptor

Green Ambi Disruptor

What's in the Combo — 2 Components, 1 Order

Ambi Disruptor FRT — Ambidextrous Forced Reset Trigger

The Triggered Company's ambidextrous Partisan Disruptor. Bilateral selector for left or right hand operation. Same patented drop-in cassette design, same 3-position function (Safe / Semi / Enhanced Semi), same 17-4 stainless + 4140 chromoly construction, same ~1,150 RPM cyclic rate. 3.75–4.1 lb pull in semi. Anti-walk pins with T-10 Torx included. US Patent 9146067. Black or Green. 100% USA made.
KAK Industry K-SPEC BCG — First BCG Built for FRT

Patented floating dead-blow carrier weight eliminates bolt bounce — no heavy buffer required. 9310 steel bolt (MPI tested, shot peened), 8620 chrome-lined carrier ground to .0002", M16 full-auto profile, S7 tool steel ejector, downward gas vents for reduced blowback and quieter suppressed report. Runs suppressed or unsuppressed with zero gas or recoil tuning. Machined in-house in Missouri. Patent US 12,474,132 B2. 14.5oz. 100% USA made.

Install — 3 Steps

Drop the Ambi Disruptor cassette into your mil-spec lower and insert the anti-walk pins
Install the KAK K-SPEC BCG in your upper
Keep your standard 3oz carbine buffer. Function check. Done.

If your rifle already has an H2 or H3, you can run it — but you don't need it. If you experience over-buffering, drop to the standard buffer.

Why Ambi

Left or right hand selector operation — bilateral lever, no modification. Switch hands, switch shoulders, the selector is where your thumb expects it
Same Disruptor internals — nothing changes about how the trigger fires or resets. The ambi selector is the only difference from the standard Disruptor
Consistent selector feel both sides — clean detents in Safe / Semi / Enhanced Semi from either lever

Why the K-SPEC Is the Right BCG for This Combo

Dead-blow carrier tail — Patent US 12,474,132 B2 — the core innovation. Floating weight counteracts bolt bounce at the rear of travel. This is what makes a standard buffer work with an FRT
Tested with major FRT systems — KAK verified with Hoffman Super Safety, AS Designs ARC-Fire, Atrius FRS, and Rare Breed FRT. The Disruptor uses the same forced reset principle
Downward gas venting — gas ports relocated to the underside of the carrier. Less gas to the face, quieter suppressed
Suppressor-ready with zero tuning — no gas block adjustment, no spring swap. Same BCG, suppressed or not
9310 steel bolt, MPI tested, shot peened — highest-strength bolt steel, inspected for defects, surface hardened
8620 chrome-lined carrier, .0002" tolerances — rails, bolt run, and gas bores ground to precision spec
Made in Missouri — machined entirely in-house on Doosan and Tsugami equipment with FANUC robotics. In-house CMM inspection

Full Specs

Trigger	Ambi Disruptor FRT — ambidextrous drop-in cassette — Black or Green
Selector	Bilateral 3-position: Safe / Semi / Enhanced Semi (FRT)
Pull Weight (Semi)	3.75–4.1 lbs
Cyclic Rate (FRT)	~1,150 RPM
Trigger Patent	US Patent 9146067
BCG	KAK Industry K-SPEC — M16 full-auto profile — 14.5oz
BCG Patent	US 12,474,132 B2 — floating dead-blow carrier weight
Bolt	9310 steel — MPI tested, shot peened, phosphate
Carrier	8620 steel — chrome-lined, ground to .0002"
Gas Venting	Downward — magazine feed lip channels
Buffer Required	Standard 3oz carbine buffer — already in your rifle
Cartridge	.223 Rem / 5.56 NATO / .300 BLK
Platform	AR-15 mil-spec lower and upper
Manufacturing	100% USA — The Triggered Company + KAK Industry (Missouri)
Combo Price	$479.99 — Black or Green

Legal Status

Federally legal following the May 2025 DOJ settlement. No NFA tax stamp, no registration. State restrictions apply in CA, CT, DE, HI, IL, MA, MD, NJ, NY, OR, RI, WA, and DC. We verify compliance on every order and do not ship to restricted states.

→ State-by-state FRT legality guide · Garland v. Cargill explained

Frequently Asked Questions

Why doesn't this combo include a buffer?

Because it doesn't need one. The KAK K-SPEC's patented floating dead-blow weight eliminates bolt bounce inside the BCG itself — the job an H2 or H3 buffer normally does for an FRT. Your standard 3oz carbine buffer already provides the correct timing. Two components instead of three. Nothing to tune.

What is the Ambi Disruptor?

The Triggered Company's ambidextrous Partisan Disruptor — same patented FRT cassette with a bilateral selector for left or right hand operation. Same function, same construction, same cyclic rate. Black or Green.

Has the KAK K-SPEC been tested with the Disruptor?

KAK tested the K-SPEC with the Hoffman Super Safety, AS Designs ARC-Fire, Atrius FRS, and Rare Breed FRT. The Disruptor uses the same forced reset principle as the Rare Breed — KAK states similarly designed systems should work. Individual rifles may need fine-tuning, but the K-SPEC removes buffer weight from the equation.

What if my rifle already has a heavier buffer?

You can run the K-SPEC with an H2 or H3 — but you don't need to. It's designed for the standard 3oz buffer. If you experience over-buffering (short-stroking, failure to lock back), drop to the standard buffer.

Is the Ambi Disruptor legal?

Yes — federally legal following the May 2025 DOJ settlement and Garland v. Cargill. One round per trigger function, no NFA tax stamp. State restrictions apply — we verify on every order.

Is everything USA made?

Yes. The Ambi Disruptor is made by The Triggered Company in the USA. The KAK K-SPEC is machined entirely in-house in Missouri. 100% USA made.

Also Available

Installation Resources

Forced reset triggers require one trigger function per round fired and operate as semi-automatic devices. State restrictions apply — it is the buyer's responsibility to comply with all applicable laws. We verify compliance and do not ship to restricted states. KAK Industry's FRT testing results are based on their testing conditions and may not reflect every rifle configuration — individual firearms may require fine-tuning. KAK K-SPEC Patent US 12,474,132 B2. Disruptor US Patent 9146067.

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