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Gear
October 10, 2026
MAC-10 / MAC-11 FRT Install: MPA Defender & Cobray Fitment

A forced reset trigger does exist for the semi-auto MAC. Here is the job end to end: which hosts the 3DP Tactical Solutions MAC FRT and the A.R.T. MAC-11/VMAC9 system actually fit, what you agree to when you buy a beta-batch unit or cut a receiver, how the install goes, why a MAC FRT fails to reset, and the state lines that stop it.

Our Top Picks

  1. #1 3DP Tactical Solutions MAC-10/MAC-11 FRT (316 Stainless) ($150): Best overall: a steel trigger replacement that lists both Cobray and MPA hosts
  2. #2 A.R.T. MAC-11/VMAC9/MPA 2-Position System ($264.99): Best for Cobray M-11/9 and VMAC9: maker-tested steel system, but it needs a receiver cut and denial bar removal
  3. #3 Advanced Reset Technology 3-Position MPA Defender A.R.T. ($264.99): Best MPA Defender system: hardened steel with a selector position that restores traditional semi

Our Top Picks

1
3DP Tactical Solutions MAC-10/MAC-11 FRT (316 Stainless)
Best overall: a steel trigger replacement that lists both Cobray and MPA hosts
$150
2
A.R.T. MAC-11/VMAC9/MPA 2-Position System
Best for Cobray M-11/9 and VMAC9: maker-tested steel system, but it needs a receiver cut and denial bar removal
$264.99
3
Advanced Reset Technology 3-Position MPA Defender A.R.T.
Best MPA Defender system: hardened steel with a selector position that restores traditional semi
$264.99

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AdvancedPCCInstall guide

MAC-10 / MAC-11 FRT Install: MPA Defender & Cobray Fitment

Yes, MAC-10 and MAC-11 FRTs exist, and the whole category is eight boutique parts with zero drop-ins. The MAC is one of the very few non-AR hosts with a real forced reset market, alongside the MP5 and the Kriss Vector. What decides your purchase is not brand, it is your host: a Cobray M11/9 has two steel options, and one of them needs a permanent cut in the receiver, while an MPA Defender has six. This guide covers which trigger fits which gun, what you agree to when you buy a beta-batch part, how the fitting goes, why a MAC FRT fires twice and dies, and where the whole category is banned. New to forced reset triggers? Start with the FRT buyer's guide, and our FRT compatible guns guide maps every platform with a forced reset path. This guide covers semi-auto MAC-pattern hosts only; registered transferable machine guns are a separate legal category and are not addressed here.

By Aditya Bawankule|Last reviewed October 2026

Key Takeaways

  • →Your host picks the trigger: a Cobray M11/9 has two steel options, the 3DP Tactical Solutions 316 stainless MAC FRT and the Advanced Reset Technology 2-position system, and the A.R.T. is the only one whose maker names the VMAC9 and Leinad guns. 3DP's printed PET-CF six-pack lists Cobray too; the other five products are cut for the MasterPiece Arms Defender.
  • →Nothing here is a drop-in: every vendor in the category states that fitting, tuning, or fabrication may be required, and the A.R.T. 2-position goes further, with a clearance cut in the upper receiver and denial bar removal on Cobray and VMAC hosts.
  • →The 3DP units are beta parts sold with no refunds: both the 316 stainless unit and the PET-CF six-pack are limited beta batches, all sales final, with no refunds for installation or functionality problems.
  • →A trigger that fires twice and dies is a bolt-speed problem: 3DP attributes MAC FRT reset failures to the bolt outrunning the trigger's mechanical reset, not to a defective part. Swapping brands will not fix it.
  • →Every Twitch variant carries a safety disclosure: the design's beta release warned of out-of-battery detonations during testing. That applies to the FTA, Minute Man Machining, and 144.1 Recoil Systems versions alike.

Does a MAC-10 or MAC-11 FRT Actually Exist?

It does, as eight parts from six small shops, and the one to buy for most people is the 3DP Tactical Solutions MAC-10/MAC-11 FRT in 316 stainless ($150). It lists Cobray hosts alongside MasterPiece Arms, it is a trigger replacement rather than a receiver modification, and 3DP is the one vendor in the category that publishes a troubleshooting resource for the MAC specifically. The exception is an owner of a Cobray, Leinad, or VMAC9 who will let a gunsmith cut the upper receiver: for that buyer, the Advanced Reset Technology MAC-11/VMAC9/MPA 2-Position System ($264.99) is the surer fit, because ART tested it on those guns by name.

There is no mass-market MAC FRT and there is not going to be one. The buying decision comes down to three questions in order. First, what host do you have, because that eliminates most of the list before price ever enters. Second, steel or printed, because a printed trigger running against a steel bolt is a wear item, not a purchase. Third, whether your gun will reset at all, which is a bolt-speed question the trigger cannot answer for you.

MAC FRT: What You Actually Pay
Cheapest way in
$40144.1 Twitch, or 3DP's PET-CF six-pack
The pick
$1503DP 316 stainless, Cobray + MPA
Cobray / VMAC9 tested
$264.99A.R.T. 2-position, receiver cut required

The MAC FRTs That Actually Exist

Eight parts from six shops, ordered by how well each one serves the widest range of MAC owners. The 3DP stainless unit leads because it is steel, lists both Cobray and MPA hosts, and goes in as a trigger replacement. The A.R.T. 2-position system follows as the one with maker-tested Cobray, Leinad, and VMAC9 fitment, at the cost of a permanent receiver cut. The three Twitch variants sit at the bottom of the list because of the design's own safety disclosure, not because of any one shop's machining. Prices span $40 to $264.99 and none of these are drop-in parts.

3DP Tactical Solutions MAC-10/MAC-11 FRT (316 Stainless)
1

3DP Tactical Solutions MAC-10/MAC-11 FRT (316 Stainless)

The one to buy for a Cobray or MPA host

$150
Buy Direct from 3DP Tac Sol
  • +Steel trigger replacement that lists Cobray hosts alongside MPA
  • +316 stainless holds up far better than the printed units
  • +Costs well under the FTA steel Twitch and both A.R.T. systems
  • −Sold as a beta R&D part with all sales final and no refunds
  • −Explicitly not a drop-in; fitting, tuning, or fabrication may be needed
  • −Vendor will not ship to 16 states and jurisdictions
2

Advanced Reset Technology A.R.T. MAC-11/VMAC9/MPA 2-Position System

Cobray, Leinad, and VMAC9 owners who accept a receiver cut

$264
Buy Direct from A.R.T.
  • +Maker-tested on eight named hosts, from the SWD/Cobray M-11/9 to the VMAC9 and MPA30
  • +Only MAC FRT whose maker names Leinad and VMAC9 fitment
  • +Open-source MPA design revised for M-11-pattern timing
  • −Requires a permanent clearance cut in the upper receiver
  • −Cobray and VMAC hosts also need the denial bar removed
  • −Closed-bolt 9mm only; not tested on open-bolt semi-autos
Advanced Reset Technology A.R.T. 3-Position MPA Defender Active Reset Trigger System
3

Advanced Reset Technology A.R.T. 3-Position MPA Defender Active Reset Trigger System

MPA Defender owners who want a real semi position back

$264
Buy Direct from A.R.T.
  • +Only MAC system with a documented selector position for traditional semi
  • +Hardened steel throughout, not a printed or sacrificial part
  • +Lifetime warranty on the reset levers and selector cams
  • −Priced nearly double the 3DP stainless unit
  • −No Cobray-pattern, VMAC, .45 ACP, or .22 LR fitment
  • −Two of the three MPA bolt patterns still require fitting
URSA-SEC MP Defender FRT
4

URSA-SEC MP Defender FRT

Testing fitment in printed material, then reordering in steel

$129
Buy Direct from URSA-SEC
  • +Lifetime no-questions parts replacement, the best support terms in the category
  • +Buy printed to test fitment, reorder in steel once it runs
  • +Steel tier undercuts the FTA and A.R.T. steel units
  • −Minor fitting may still be required depending on host tolerances
  • −No published fitment list for Cobray-pattern guns specifically
Minute Man Machining The Twitch (MPA)
5

Minute Man Machining The Twitch (MPA)

The best-built Twitch, and the one that lists a .45 ACP size

$120
Buy Direct from Minute Man Machining
  • +Steel Twitch priced well under FTA's version of the same design
  • +Caliber-specific sizing across 9mm, 5.7, and .45 ACP
  • +4140 pre-hardened steel solves the printed Twitch's short service life
  • −The Twitch design's original beta release warned of out-of-battery detonations during testing
  • −Vendor states some fitment may be required
  • −No published warranty on the part
3DP Tactical Solutions MAC-10/MAC-11 FRT (PET-CF 6-Pack)
6

3DP Tactical Solutions MAC-10/MAC-11 FRT (PET-CF 6-Pack)

Proving fitment cheaply before spending on steel

$40
Buy Direct from 3DP Tac Sol
  • +Six triggers per pack, the lowest cost per trigger in the category
  • +Multi-pack matches the reality that printed FRTs are consumables
  • +Same proven geometry as 3DP's steel unit, so it doubles as a fitment test
  • −Printed polymer wears against the steel bolt and will need replacement
  • −Beta part with all sales final and no refunds
  • −Not a drop-in; expect fitting and tuning
FTA Tactical The Twitch BETA FRT (4140 Steel)
7

FTA Tactical The Twitch BETA FRT (4140 Steel)

The only Twitch variant carrying a lifetime warranty

$189
10% off at checkout
Buy Direct from FTA Tactical
  • +Only Twitch variant with a lifetime warranty
  • +4140 steel fixes the printed design's short service life
  • +Vendor discloses the design's safety history rather than hiding it
  • −FTA's own page reports out-of-battery detonations during the design's beta testing
  • −Costs well over Minute Man Machining's steel version of the same design
  • −Fitment on non-MPA MAC-pattern guns may require modification
144.1 Recoil Systems The Twitch (MPA/MAC)
8

144.1 Recoil Systems The Twitch (MPA/MAC)

The cheapest single unit

$40
Buy Direct from 144.1 Recoil Systems
  • +Cheapest single-unit MAC FRT
  • +Vendor is candid about beta status and tested fitment rather than overclaiming
  • +Low enough cost that a failed fitment attempt is not painful
  • −The Twitch design's beta release reported out-of-battery detonations during testing
  • −Tested only on MPA Defender; no verified Cobray fitment path without modifying the host
  • −Installed or modified units cannot be returned; uninstalled returns take a 15% restocking fee

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Which MAC Host Do You Have: Cobray, VMAC9, or MPA Defender?

A Cobray M11/9 buys the 3DP 316 stainless unit or the A.R.T. 2-position system, a VMAC9 or Leinad owner buys the A.R.T. 2-position, the only system whose maker names those guns, and an MPA Defender can buy almost anything on the list. Internal geometry differs between the Cobray and MPA MAC variants, so a trigger cut for a Defender is not a trigger cut for an M11/9, and five of the eight products in this category were built around the Defender alone.

Advanced Reset Technology now sells two separate MAC systems, and they do not share a fitment list. The 3-position MPA Defender system fits the MPA30T, MPA30SST, MPA930DMG, MPA930SST, MPA935SST, and MPA9300SS, and ART still lists VMAC, Cobray-pattern, .45 ACP, and .22 LR guns as not compatible with it. The MAC-11/VMAC9/MPA 2-Position System is a separate kit with its own list: it is tested on the SWD/Cobray M-11/9, FMJ M-11/9, Leinad M-11/9, Leinad PM-11, Leinad CM-11, the MasterPiece Arms MPA30 in top-charging and side-charging form, the Velocity VMAC9, and the Vulcan VMAC-9. 144.1 Recoil Systems has tested its Twitch on the MPA Defender only. For a Cobray, then, the decision is between the 3DP trigger replacement with no fitment guarantee and the A.R.T. system with tested fitment and a receiver cut.

The A.R.T. 2-Position: A MAC-11 and VMAC9 FRT With a Receiver Cut

The Advanced Reset Technology MAC-11/VMAC9/MPA 2-Position System, released October 9, 2026, is the MAC-11 FRT to buy if your gun is on its tested list and you accept a permanent receiver modification. It is a steel system built for semi-automatic, closed-bolt 9mm MAC-pattern guns, developed around the traditional Cobray M11/9 and comparable full-size 9mm MAC designs, and it is the first ART product that fits a Cobray at all. ART describes it as its adaptation of Toadlicker556's open-source MPA FRD design, revised for the timing of M-11-pattern guns. It has not been tested with open-bolt semi-autos, and ART notes that fitment can still vary by manufacturer, production year, receiver dimensions, and aftermarket parts.

The install is the trade. The upper receiver needs added clearance for the reset lever, cut with the purpose-built alignment jig included in every kit; ART says that clearance is intended to preserve normal operation if the system is removed. VMAC and Cobray models also require removal of the denial bar. ART recommends professional installation and a safety inspection, and that is the right call: this is gunsmith work on the serialized receiver, not a trigger swap on the bench.

Choose between it and the 3DP stainless unit on one question: will you permanently modify the receiver? If yes, the A.R.T. is the stronger buy for a Cobray, FMJ, or Leinad M-11/9, and the only system whose maker names the VMAC9, Leinad PM-11, and Leinad CM-11. If no, the 3DP unit goes in as a trigger replacement, with the trade-off that 3DP sells it as a beta part with no refunds and no guaranteed fit.

Installing a MAC FRT: What the Job Actually Involves

Plan on a fitting session, not a five-minute swap. Every vendor in this category, including the ones selling steel, states that fitting, tuning, or fabrication may be needed and that fitment varies by host. The mechanical job is simple: the FRT replaces the factory trigger and is driven forward by the bolt as it cycles, so the trigger resets against your finger while still firing one round per function. Getting it to do that on your specific gun is where the time goes. The steps below cover the trigger-replacement units from 3DP, URSA-SEC, and the Twitch makers; the A.R.T. systems follow ART's own instructions, and the 2-position adds the receiver cut covered above.

  1. 1.
    Identify the host first. A Cobray means the 3DP stainless unit or the A.R.T. 2-position, and a VMAC9 points to the A.R.T. 2-position, the only system that names it. MPA Defender opens the whole list, and if it is a .45 ACP Defender, Minute Man Machining is the one shop that lists that size.
  2. 2.
    Clear the gun. Magazine out, bolt locked back, chamber checked by eye and by finger. Nothing else starts until the gun is cold.
  3. 3.
    Pull the factory trigger and keep it. Separate the upper from the frame, drive the trigger pin, and set the original trigger and spring aside. A printed FRT is a consumable; you will want the factory part on the shelf.
  4. 4.
    Dry-fit and relieve the trigger, not the gun. Fit the FRT with no spring pressure and move it through full travel looking for a bind. Take material off the trigger to clear it. This is the step the 3DP six-pack ($40) and URSA-SEC's printed tiers exist for: prove the fit on a cheap part before you commit to steel.
  5. 5.
    Hand-cycle before you load anything. Reassemble, hold the trigger to the rear, and cycle the bolt by hand. You should feel the trigger driven forward against your finger as the bolt returns. If it will not reset by hand, it will not reset under recoil, and no ammunition change is going to rescue it.
  6. 6.
    Lubricate heavily and live-fire two rounds at a time. Eye protection on, gun wet, two rounds in the magazine, and confirm one round per trigger function before you work up. If you are running any Twitch variant, get the gun inspected by a gunsmith before this step.

Why Your MAC FRT Fires Twice and Goes Dead

The bolt is outrunning the trigger. That is 3DP Tactical Solutions' own explanation for MAC FRT reset failures, and it is a timing problem between the trigger and a fast open-bolt-style cycle, not a defect in the part you bought. The MAC bolt is heavy and moves fast, and when the reset lever cannot keep pace with it, the trigger stops being driven forward and the gun goes dead after a round or two.

3DP names the contributing factors directly: high bolt speed, the open-bolt cycling behavior of the platform, recoil variation, and manufacturing tolerance differences between guns. The fixes are system-level. Manage bolt speed, keep cycling energy consistent across the string, and maintain proper trigger-to-bolt interaction through the fit. Ammunition is one of the inputs here, not a scapegoat: 3DP states outright that performance varies by ammunition, bolt speed, and configuration. Advanced Reset Technology describes its 2-position system as an open-source MPA design revised specifically for M-11-pattern timing.

Do not import an AR-15 answer into this. A MAC has no AR fire control group and no buffer tube, so "go up to an H3 buffer" is not available to you, and there is no cassette to swap. What does transfer from the AR world is the diagnostic discipline: a trigger that freezes with no hammer fall is a reset problem, and a gun that goes bang late is a different problem entirely. Our AR-15 FRT tuning guide separates those three failure modes properly, and the framing carries over even though the hardware does not. The same bolt-versus-trigger race is what makes blowback PCCs difficult hosts in general, which our AR9 FRT build guide works through on a platform where you actually have mass and gas to tune with.

What Else the Build Needs

Magazines and a rear interface, in that order. A forced reset trigger burns through ammunition faster than any other upgrade on the gun, and a 9mm MPA Defender feeds from the factory 30-round magazine ($39.49) while the 5.7x28mm Defender has exactly one option, the factory 20-rounder ($57.39). The Defender also ships with no rear interface at all, so the A3 Industries aluminum rear stock adapter ($67.99) is what lets you put a brace or a stock on it. Note the classification tripwire before you order that adapter: putting a shoulder stock on a pistol-configured MAC with a barrel under 16 inches makes it a short-barreled rifle. A brace does not, since the 2023 brace rule was vacated and is not enforced.

MasterPiece Arms MPA Defender 30-Round Magazine (9mm)
Factory 30-round 9mm

MasterPiece Arms MPA Defender 30-Round Magazine (9mm)

Spare magazines for a 9mm Defender
  • 30 rounds
  • 9mm
  • Factory OEM
$39.49 Catalog
Shop at Classic Firearms
MasterPiece Arms MPA Defender 20-Round Magazine (5.7x28mm)
Factory 20-round 5.7x28mm

MasterPiece Arms MPA Defender 20-Round Magazine (5.7x28mm)

The only magazine for a 5.7 Defender
  • 20 rounds
  • 5.7x28mm
  • Factory OEM
$57.39 Catalog
Shop at Classic Firearms
A3 Industries MPA Defender Rear Stock Adapter
Aluminum rear interface

A3 Industries MPA Defender Rear Stock Adapter

Adding a brace or stock to a Defender
  • Aluminum
  • Brace/stock mount
  • Rear interface
$67.99 Catalog
View at OpticsPlanet

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Why Every MAC FRT Comes From a Shop You Have Never Heard Of

Because the addressable market is a few thousand guns and the parts have to be fitted one at a time. A MAC-pattern FRT cannot be tooled, boxed, and sold as a drop-in the way an AR-15 cassette can, so the shops that make them are one-and-two-person operations printing and machining in small batches, selling direct, and disclosing beta status because the parts genuinely are beta. That is the same market structure behind the Kriss Vector FRT and, in a different form, the Glock FRT landscape, and our HK UMP FRT guide covers another non-AR host, and the Browning M1919 FRT guide covers a belt-fed one where the timing gauges do the fitting. Buy accordingly: expect lead times, expect to fit the part, and read the return terms before you order.

MAC FRT Legality: Federal Footing and 16 Restricted Jurisdictions

A forced reset trigger fires one round per function of the trigger, so it is not a machine gun under the National Firearms Act: no registration, no tax, no stamp on the trigger itself. The 2025 DOJ settlement with Rare Breed Triggers ended federal enforcement against FRTs, and its coverage is written around rifles and grip-forward pistols. Everything on this page is for a semi-auto MAC-pattern host. Registered transferable full-auto MACs are a different legal category with different rules, and nothing here applies to them.

The MAC is the awkward case, and you need to know which side of it your gun sits on. A MAC-pattern carbine with a 16-inch barrel and a shoulder stock is a rifle, and the settlement's rifle coverage applies to it directly. A pistol-configured MPA Defender or Cobray M11/9, braced or bare, is a handgun that feeds from its trigger-hand grip, and the settlement's pistol coverage runs to grip-forward designs, the AR and AK pistols and MP5-pattern guns that take the magazine ahead of the grip. A grip-fed MAC sits outside that. The settlement neither blesses nor bans an FRT there; it simply does not reach it. So the federal footing for an FRT in a pistol-configured MAC is less settled than it is for a MAC carbine, and you should not treat "federally legal per the settlement" as a finished answer for a MAC pistol.

State law is the harder gate, and it restricts or bans FRTs in sixteen jurisdictions regardless of federal status: California, Colorado, Connecticut, Delaware, Florida, Hawaii, Illinois, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New York, Oregon, Rhode Island, and the District of Columbia. Florida is legally ambiguous rather than a named ban. Washington state does not ban FRTs, even though several vendors in this category will not ship there. A vendor no-ship list is a shipping policy, not a statute, so check the law for your state rather than reading a checkout page as legal advice. The FRT buyer's guide tracks the federal picture across platforms as it moves.

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MAC-10 / MAC-11 FRT FAQ

▶Are forced reset triggers legal now?
Federally, a forced reset trigger fires one round per function of the trigger, so it is not an NFA machine gun. The 2025 DOJ settlement with Rare Breed Triggers ended federal enforcement against FRTs on rifles and grip-forward pistols. Sixteen jurisdictions restrict or ban them regardless of federal law: CA, CO, CT, DE, FL, HI, IL, MD, MA, MN, NV, NJ, NY, OR, RI, and DC. Florida is legally ambiguous rather than a named ban. Washington state does not ban FRTs, despite what several retailer no-ship lists say.
▶Does a MAC-10 or MAC-11 FRT count as a pistol FRT?
It depends on how your host is configured, and the distinction matters. A MAC-pattern carbine with a 16-inch barrel and a shoulder stock is a rifle, and the 2025 DOJ settlement with Rare Breed Triggers covers it directly. A pistol-configured MPA Defender or Cobray M11/9, braced or bare, feeds from its trigger-hand grip, and the settlement's pistol coverage runs to grip-forward designs that take the magazine ahead of the grip, such as AR and AK pistols and MP5-pattern guns. A grip-fed MAC pistol falls outside that coverage, so the federal footing for an FRT there is less settled than it is for a rifle. The mechanism is still one round per trigger function either way. Verify federal and state law for your specific configuration before buying.
▶Which MAC FRT fits a Cobray M11/9?
Two steel options fit a Cobray M11/9, and the choice comes down to whether you will modify the receiver. The Advanced Reset Technology MAC-11/VMAC9/MPA 2-Position System ($264.99) is maker-tested on the SWD/Cobray, FMJ, and Leinad M-11/9, but it requires a clearance cut in the upper receiver, made with a jig included in the kit, and Cobray hosts also need the denial bar removed; ART recommends professional installation. The 3DP Tactical Solutions 316 stainless MAC FRT ($150) is a trigger replacement that 3DP lists for Cobray variants, but 3DP sells it as a beta part, all sales final, with no fitment guarantee. ART's older 3-position system is MPA Defender only and does not fit a Cobray, and 144.1 Recoil Systems has tested its Twitch only on MPA Defenders.
▶Is there a MAC-11 FRT for the VMAC9?
Yes. The Advanced Reset Technology MAC-11/VMAC9/MPA 2-Position System, released October 9, 2026, lists the Velocity VMAC9 and Vulcan VMAC-9 among its tested hosts, alongside the SWD/Cobray, FMJ, and Leinad M-11/9, the Leinad PM-11 and CM-11, and the MasterPiece Arms MPA30. It is a steel system priced at $264.99. It is not a drop-in: the upper receiver needs a clearance cut for the reset lever, made with the alignment jig ART includes, and VMAC hosts require removal of the denial bar. It is limited to semi-automatic, closed-bolt 9mm guns, and it is the only MAC FRT whose maker names the VMAC9.
▶Does the A.R.T. MAC-11 system require modifying the receiver?
Yes. Advanced Reset Technology states that the MAC-11/VMAC9/MPA 2-Position System requires an upper receiver modification to add clearance for the reset lever, and every kit includes a purpose-built alignment jig for that cut. ART says the clearance is intended to preserve normal operation if the system is later removed. Cobray and VMAC models also require removal of the denial bar. Both are permanent changes to the receiver, the serialized part of the gun, and ART recommends professional installation and a safety inspection.
▶Why does my MAC FRT fire two rounds and then go dead?
That is a reset failure, and on a MAC it is almost always bolt speed rather than a defective trigger. 3DP Tactical Solutions' own troubleshooting page attributes MAC FRT reset problems to the timing and interaction between the trigger and a fast open-bolt cycle: the bolt outruns the trigger's mechanical reset. The fixes are system-level, managing bolt speed and keeping cycling energy consistent, not swapping trigger brands. Ammunition choice is one of the inputs, not a trigger defect.
▶Is the Twitch FRT safe?
The Twitch is an open-source design sold in steel by FTA Tactical, Minute Man Machining, and 144.1 Recoil Systems. FTA discloses that the original beta release warned that testing experienced out-of-battery detonations during development, and that heavy lubrication appeared to reduce or eliminate the issue in limited testing. FTA recommends inspection by a qualified gunsmith before use. That disclosure belongs to the design lineage, not to any one vendor's machining. If you buy any Twitch variant, have a gunsmith check the gun, lubricate generously, and wear eye protection when you function-test it.
▶How much does a MAC-10 or MAC-11 forced reset trigger cost?
From $40 to $264.99. The floor is 144.1 Recoil Systems' Twitch at $40 and 3DP's PET-CF six-pack at $40. The steel units run $120 for Minute Man Machining's Twitch, $129.99 for URSA-SEC's steel MP Defender FRT, $150 for 3DP's 316 stainless unit, and $189.99 for FTA's steel Twitch. The top of the range is Advanced Reset Technology: the MAC-11/VMAC9/MPA 2-Position System for Cobray, Leinad, VMAC9, and MPA30 hosts at $264.99, and the MPA Defender 3-position system, a hardened steel reset lever plus a selector, at $264.99.

The Bottom Line

Buy the 3DP Tactical Solutions 316 stainless MAC FRT ($150) if you have a Cobray or an MPA Defender and want steel without cutting the receiver. It is a beta part with no refunds, and it is still the right call for most owners.

If you own a Cobray, Leinad, or VMAC9 and will have a gunsmith make the receiver cut and, on Cobray and VMAC hosts, pull the denial bar, the Advanced Reset Technology MAC-11/VMAC9/MPA 2-Position System ($264.99) is the system whose maker tested it on your gun. If your host is an MPA Defender and you want a warranty and a real semi position, ART's 3-position system ($264.99) gives you both. Testing the water on a budget? The 3DP PET-CF six-pack ($40) proves fitment on your gun before you spend on steel. Whatever you pick, treat it as a fitted part, hand-check the reset before live fire, and confirm your state allows FRTs at all.

Aditya Bawankule
Aditya BawankuleAuthor

Avid shooter with 10+ years of experience including competition shooting, an associate member of the Professional Outdoor Media Association (POMA), and a member of the National Shooting Sports Foundation (NSSF) and Safari Club International (SCI). Built 10+ AR-pattern rifles and several handgun platforms for home defense, competition, and suppressed night shooting.

10+ years shooting experienceCompetition shooterBuilt 10+ AR-pattern riflesAssociate member of the Professional Outdoor Media Association (POMA)Member of the National Shooting Sports Foundation (NSSF)Member of Safari Club International (SCI)

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Factory FRT Guns 2026: Every Rifle and PCC With Forced Reset
IndustryFRT

Factory FRT Guns 2026: Every Rifle and PCC With Forced Reset

Four makers now ship firearms with a forced reset trigger or selector installed and tuned at the factory: the One Horse Express ($999) with the Atrius FRS, B&T's SPC9 and GHM9 with the Rare Breed FRT-SG3, the LSD Arms billet AR-15 ($1,999) with the Triggered Company Disruptor, and the Tippmann M4-22 ELITE FRT rimfire ($1,578).

Jul 208 min
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Triggered Company Launches The Wrangeler AK FRT: Drop-In Cassette
NewsAK

Triggered Company Launches The Wrangeler AK FRT: Drop-In Cassette

The Triggered Company launched The Wrangeler, a three-position drop-in AK FRT cassette in four versions, with manufacturer-published fitment by SKU.

Sep 165 min
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Atrius Launches X-Series FRS for MCX, MPX, and Rattler
NewsAR-15

Atrius Launches X-Series FRS for MCX, MPX, and Rattler

Atrius launched the X-Series ambidextrous forced reset selector for SIG MCX, MPX, Rattler, and the Spear LT upper conversion kit. X-Series Heavy is the distinct SKU for full-size MCX Spear in .308 and 6.8x51 / .277 Fury.

Aug 1210 min
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