A.R.T. 3-Position MPA Defender Active Reset Trigger System
Hardened steel reset lever plus a 3-position selector that gives the MPA Defender a real semi mode and an A.R.T. mode.
- Price
- $265
- Weight
- 2.5 oz
- Brand
- Advanced Reset Technology
- Category
- Triggers
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Features
- •Hardened steel reset lever and 3-position selector
- •Position 1 safe, position 2 traditional semi, position 3 A.R.T.
- •Released and orderable for six named MPA Defender models only
- •Cobray-pattern and VMAC hosts: ART's separate 2-position system, not this one
- •Drop-in on one of three MPA bolt patterns; the other two need fitting
- •$264.99, 4 to 8 week lead time
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Overview
Advanced Reset Technology builds the most complete MAC-pattern reset system on the market. It is not a single trigger part but a hardened steel reset lever paired with a 3-position selector: position one is the safety, position two is traditional semi-automatic fire with the reset feature disengaged, and position three engages active reset. That second position is what separates it from the trigger-replacement MAC FRTs, which are one-part devices you either have installed or do not.
Fitment is narrow and the vendor is specific about it. The released, orderable system covers six models: the MPA30T, MPA30SST, MPA930DMG, MPA930SST, MPA935SST, and MPA9300SS. This system does not fit Velocity VMAC variants, Cobray-pattern guns, .45 ACP MPA Defenders, or .22 LR variants. For Cobray M-11/9 and VMAC9 hosts, ART sells a separate MAC-11/VMAC9/MPA 2-Position System. One of the three MPA bolt patterns drops in; the other two require fitting.
It sits at the top of the MAC price range, carries a lifetime warranty on the reset levers and selector cams, and is built around a selector rather than a single sacrificial part.
Key Features
- Hardened steel reset lever and hardened steel 3-position selector
- Position 3 engages active reset; position 2 restores traditional semi
- Fits MPA30T, MPA30SST, MPA930DMG, MPA930SST, MPA935SST, MPA9300SS
- Drop-in on one of three MPA bolt patterns; the other two require fitting
- Lifetime warranty on reset levers and selector cams
- Small-batch manufacturing with a 4 to 8 week lead time
- One round per trigger function; semi-automatic operation retained
Pros
- +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
- +Vendor publishes an exact compatible-model list instead of vague MAC fitment
Cons
- −Priced nearly double the 3DP stainless unit
- −No Cobray-pattern, VMAC, .45 ACP, or .22 LR fitment
- −4 to 8 week lead time on small-batch production
- −Two of the three MPA bolt patterns still require fitting
Detailed Specifications
- Material
- Hardened steel reset lever and 3-position selector
- function
- Active reset trigger system, one round per trigger function
- compatibility
- MPA30T, MPA30SST, MPA930DMG, MPA930SST, MPA935SST, MPA9300SS. Not compatible with VMAC variants, Cobray-pattern guns, .45 ACP MPA Defenders, or .22 LR variants
- availability
- Released and orderable direct from Advanced Reset Technology (September 2026)
- install
- Drop-in on one of three MPA bolt patterns; the other two require fitting. Function check before live fire
- warranty
- Lifetime warranty on reset levers and selector cams
- leadTime
- 4 to 8 weeks
- legalStatus
- Verify current federal, state, and local forced reset trigger legality before ordering
- manufacturer
- Advanced Reset Technology
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