ARC Fire Trigger | AR-15 Forced Reset Trigger | Ambi Safety

AS Designs

AS Designs ARC Fire Trigger | AR-15 Forced Reset Trigger | Ambi Safety

SKU: AR15-AS-TRIG-BLK-ARC-146
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Price $249.99
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AS Designs ARC-Fire — Ambidextrous AR-15 Forced Reset Trigger

The AS Designs ARC-Fire is a patent-pending ambidextrous selector trigger system that uses Active Reset Clutch (ARC) technology to mechanically force the trigger to reset immediately after each shot. The result is one round per trigger pull, every time, with a significantly faster and more consistent reset than a standard AR-15 trigger group allows. It is available exclusively through select dealers including NSPEC Innovations.

Unlike full drop-in FRT kits, the ARC-Fire works alongside your existing trigger rather than replacing it. If you are running a quality trigger — Geissele, ALG, BCM, or any mil-spec trigger with a super safety cut — your semi-auto pull stays exactly as it was. The ARC system adds the forced reset capability through the selector mechanism, not the fire control group itself.

Features and Specifications

  • Patent-pending Active Reset Clutch (ARC) technology — forces immediate, positive trigger reset after every shot
  • Fully ambidextrous selector — smooth operation for both right- and left-handed shooters
  • Three-position selector: Safe / Semi / ARC — fast transitions with positive tactile feedback in each position
  • Tool-steel internals for durability under sustained use
  • 4140 steel selectors
  • DLC (Diamond-Like Carbon) coating on the cam, lever, and detent bar
  • Black oxide coating on selector levers
  • Includes: ARC cam, lever, detent bar, primary selector, ambi selector, pre-cut trigger, and standard safety detent
  • Works with your existing trigger — does not replace your current fire control group
  • Multi-platform compatible — supports 10+ platforms, with additional Slip Trip Kits required for non-AR hosts

How the ARC-Fire Works

The Active Reset Clutch system integrates into the selector position of your lower receiver. When engaged in ARC mode, the cam mechanism physically pushes the trigger forward to its reset point after the bolt carrier completes its rearward travel. This produces a consistent, tactile reset that the shooter can feel and anticipate, enabling faster follow-up shots without loss of control. Because it operates through the selector rather than the trigger group itself, the system does not alter the trigger's pull weight, take-up, or break characteristics in Semi mode.

Platform Compatibility

The ARC-Fire is compatible with over 10 platforms. Standard AR-15 builds require no additional parts beyond the base kit. Several non-AR platforms require a platform-specific Slip Trip Kit, sold separately.

No additional kit required:

  • AR-15 — .223/5.56, .300 Blackout, 9mm, 10mm, .45 ACP, .40 S&W
  • HK MR556A1/A4 — no modifications needed, does not require a different bolt carrier

Requires platform-specific Slip Trip Kit or additional parts:

  • MCX / MPX — requires MCX/MPX Slip Trip Kit (available at NSPEC). MCX users must also remove the firing pin safety latch for reliable function.
  • JAKL-15 — .223/5.56 and .300 Blackout — requires JAKL-15 Slip Trip Kit
  • JAKL-10 — .308 — requires JAKL-10 Slip Trip Kit and Custom ARC Lever
  • BRN-180 — .223/5.56 and .300 Blackout — requires BRN-180 Slip Trip Kit and Custom ARC Lever
  • MP5 platform — fits AR-based MP5 lowers; some lowers (Leber V2) require the version with selector-area cutout
  • G3/91 platform — similar fitment considerations as MP5
  • SCAR, AP53, UMP, STRIBOG, DISSENT — platform-specific kits required; contact NSPEC for current availability

Known incompatible triggers (trigger replacement required before installation): LaRue Tactical MBT-2S, CMC Single Stage Flat/Curved, Rise Armament RA-140.

Lever Blocker Note

Some trigger configurations require an additional lever blocker part to prevent overtravel during ARC mode. NSPEC Innovations offers this part in metal, and can also provide the STL file for customers who prefer to 3D print their own. Contact NSPEC before ordering if you are unsure whether your specific trigger requires this part.

State Restrictions and Legal Notice

The ARC-Fire is not available for shipment to states that restrict or ban rate-of-fire modifying devices or forced reset triggers. Restricted states currently include California, Colorado (Broomfield and Boulder County only), Connecticut, Delaware, Florida, Hawaii, Illinois, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New York, Oregon, Rhode Island, and Washington. This list reflects current AS Designs shipping restrictions — confirm your state's current statutes before ordering.

By purchasing from NSPEC Innovations, you affirm that you understand and will comply with all applicable federal, state, and local laws governing this product. Firearm laws vary by jurisdiction. It is your responsibility to confirm legality in your area before purchasing. NSPEC Innovations is not responsible for misuse, unlawful use, or improper installation. No refunds on this product. Purchaser must be 18 years of age or older. For a detailed state-by-state research workflow, see the NSPEC FRT buyer's guide.

Frequently Asked Questions

  • What is the AS Designs ARC-Fire and how does it work?

    The ARC-Fire is an ambidextrous selector trigger system that uses patent-pending Active Reset Clutch (ARC) technology to mechanically force the trigger to reset after each shot. It installs in place of your existing safety selector. In ARC mode, a cam mechanism inside the lower pushes the trigger forward to its reset point as the bolt carrier returns, enabling one round per trigger pull at a significantly faster cadence than a standard trigger reset allows. In Safe and Semi modes, it functions identically to a standard safety selector with no effect on trigger feel.

  • Does the ARC-Fire replace my existing trigger?

    No. The ARC-Fire is a selector-based system that works alongside your existing trigger, not a complete trigger group replacement. If you are running a quality trigger such as a Geissele, ALG, or BCM, your semi-auto pull weight, take-up, and break characteristics remain unchanged. The kit includes a pre-cut trigger as a convenience option, but any mil-spec trigger with a super safety cut is compatible. The three known incompatible triggers that require replacement are the LaRue Tactical MBT-2S, CMC Single Stage Flat/Curved, and Rise Armament RA-140.

  • What platforms is the ARC-Fire compatible with?

    The ARC-Fire supports over 10 platforms. Standard AR-15 builds in .223/5.56, .300 Blackout, 9mm, 10mm, .45 ACP, and .40 S&W work with the base kit and no additional parts. The HK MR556A1/A4 also requires no modifications. Non-AR platforms including the MCX, MPX, JAKL-15, JAKL-10, BRN-180, MP5, G3/91, SCAR, STRIBOG, and DISSENT require platform-specific Slip Trip Kits or additional levers sold separately. Contact NSPEC if you are unsure whether your specific host requires additional components.

  • How does the ARC-Fire differ from a standard drop-in FRT kit?

    A drop-in FRT kit replaces the entire fire control group — hammer, trigger, and disconnector — with a purpose-built system designed around the forced reset mechanism. The ARC-Fire takes a different approach: it modifies the selector to drive the reset rather than replacing the trigger group. This means you keep your existing trigger's pull characteristics in semi mode, and the ARC mechanism activates only when the selector is in ARC mode. For shooters already running a quality trigger they want to preserve, the ARC-Fire is a meaningful advantage over drop-in FRT kits that force you to trade your trigger for the forced reset function.

  • Does the MCX installation require any modifications to the rifle?

    Yes. MCX installations require the MCX/MPX Slip Trip Kit (available separately at NSPEC) and also require removal of the MCX's firing pin safety latch before the ARC-Fire will function reliably. Without removing the latch, trigger reset failures will occur. This modification is specific to the MCX platform and is not required on standard AR-15 builds. Review the MCX-specific installation notes from AS Designs before proceeding.

  • What is the lever blocker, and do I need one?

    The lever blocker is a small part that prevents overtravel of the trigger in ARC mode on certain trigger configurations. Not all trigger and lower combinations require it, but some do. NSPEC Innovations offers the lever blocker in metal and can provide the STL file for customers who prefer to 3D print their own. If you are unsure whether your specific trigger requires one, contact NSPEC before placing your order rather than after, since the ARC-Fire does not accept refunds.

  • What coatings are used on the ARC-Fire components?

    The cam, lever, and detent bar are finished with DLC (Diamond-Like Carbon) coating, which provides very high surface hardness and low friction for smooth, consistent operation under repeated cycling. The selector levers use black oxide coating. The internals are tool steel and the selectors are 4140 steel. These material and coating choices are suited to sustained high-cadence use without the accelerated wear that would occur on softer or uncoated components.

  • Is the ARC-Fire legal in my state?

    AS Designs does not ship the ARC-Fire to California, Colorado (Broomfield and Boulder County), Connecticut, Delaware, Florida, Hawaii, Illinois, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New York, Oregon, Rhode Island, or Washington. If your state is not on this list, you are still responsible for confirming legality under your state's specific statutes before purchasing. Some states restrict rate-of-fire modifying devices under definitions that may apply to the ARC-Fire even when not explicitly named. The NSPEC FRT buyer's guide walks through a step-by-step state verification process.

  • Can I use the ARC-Fire with a suppressor?

    Yes, the ARC-Fire has been tested with suppressors, including a review that ran 400 rounds through an MCX Spear LT with a HUXWRX Flow 556K suppressor in ARC mode. Suppressor use does not prevent the system from functioning, though the back-pressure characteristics of suppressed fire can affect cycling on some gas-impingement platforms. No specific suppressor compatibility limitations are noted by AS Designs for standard AR-15 builds.

  • Are there refunds or returns on the ARC-Fire?

    No. NSPEC Innovations does not accept refunds on the ARC-Fire. This policy aligns with the AS Designs manufacturer policy and applies to all purchases regardless of reason. If you have questions about platform compatibility, trigger compatibility, or whether your specific build requires additional parts such as a Slip Trip Kit or lever blocker, contact NSPEC before placing your order. The customer service team at NSPEC can help you confirm compatibility before purchase.

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