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 actually fits, what you agree to when you buy a beta-batch unit, how the install goes, why a MAC FRT fails to reset, and the state lines that stop it.
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Yes, a MAC-10 FRT exists, and the whole category is seven 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 exactly one steel option, 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. This guide covers semi-auto MAC-pattern hosts only; registered transferable machine guns are a separate legal category and are not addressed here.
It does, from seven small shops, and the one to buy for most people is the 3DP Tactical Solutions MAC-10/MAC-11 FRT in 316 stainless at $150. It is the only steel unit whose maker lists Cobray hosts alongside MasterPiece Arms, and 3DP is the one vendor in the category that publishes a troubleshooting resource for the MAC specifically. Everything else in the category is either MPA-Defender-only or a printed consumable.
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.
Seven parts from seven shops, ordered by how confidently we can tell you they will run on your gun. The 3DP stainless unit leads because it is the only steel trigger with published Cobray fitment. 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.
The one to buy for a Cobray or MPA host
MPA Defender owners who want a real semi position back
Testing fitment in printed material, then reordering in steel
The best-built Twitch, and the one that lists a .45 ACP size
Proving fitment cheaply before spending on steel
The only Twitch variant carrying a lifetime warranty
The cheapest single unit
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A Cobray M11/9 buys the 3DP 316 stainless unit; an MPA Defender can buy any of the seven. That is the entire fitment picture, and it is the reason most MAC owners come away thinking no FRT exists for their gun. 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 six of the seven products in this category were built around the Defender.
Advanced Reset Technology is the most explicit about this. Its 3-position system fits the MPA30T, MPA30SST, MPA930DMG, MPA930SST, MPA935SST, and MPA9300SS, and it does not fit Cobray-pattern guns, Velocity VMAC variants, or the .45 ACP Defender, with .22 LR untested. 144.1 Recoil Systems has tested its Twitch on the MPA Defender only. That leaves the 3DP steel unit as the Cobray answer.
| Trigger | Price | Listed hosts | Material |
|---|---|---|---|
| 3DP Tac Sol 316 Stainless | $150 | Cobray / MPA Defender | 316 stainless |
| 3DP Tac Sol PET-CF 6-Pack | $40 | Cobray / MPA Defender | PET-CF printed |
| A.R.T. 3-Position | $264.99 | MPA Defender (six named models) | Hardened steel |
| URSA-SEC MP Defender FRT | $59.99-$129.99 | MPA Defender | PLA through steel |
| Minute Man Machining Twitch | $120 | MPA Defender, 9mm / 5.7 / .45 | 4140 pre-hardened |
| FTA Tactical Twitch | $189.99 | MPA Defender | 4140 steel |
| 144.1 Recoil Systems Twitch | $40 | MPA Defender (tested) | Printed |
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 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.
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.
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.
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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. Buy accordingly: expect lead times, expect to fit the part, and read the return terms before you order.
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.
The Bottom Line
Buy the 3DP Tactical Solutions 316 stainless MAC FRT ($150) if you have a Cobray or an MPA Defender and want the one steel trigger whose vendor lists both. It is a beta part with no refunds, and it is still the right call.
If your host is an MPA Defender and you want a warranty and a real semi position, the Advanced Reset Technology 3-position system ($264.99) is the only product in the category that gives you both. Testing the water on a budget? The $40 3DP PET-CF six-pack 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.
New FRT install guides, non-AR host coverage, and legal updates when they publish.
Avid shooter with 10+ years of experience including competition shooting, and an associate member of the Professional Outdoor Media Association (POMA). Built 10+ AR-pattern rifles and several handgun platforms for home defense, competition, and suppressed night shooting.
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