The Atrius X-Series Ambidextrous Forced Reset Selector is the FRS for Sig Sauer gas-piston rifles and PCCs. A new trip system with a slip base and slip clutch gives it universal fitment across the MCX and MPX lines, and it includes an FRS lever sized for MCX/MPX. Positions are Safe, Semi and Super-Semi.
Features
- Ambidextrous Atrius selector switch with lever blocker
- Slip base and slip clutch trip system for gas-piston platforms
- Includes an FRS lever dimensioned for MCX/MPX
- Precise 90° indexing with tactile feedback
- Drop-in installation, no modifications
- Heat-treated 4140 steel with a corrosion-resistant black nitride finish
- Made in the USA
Compatibility
- Sig Sauer MCX, MCX Virtus, MCX-Spear LT, MCX-Rattler LT, MCX-Spear LT Upper AR Conversion Kit, MPX PCC and MPX-K, all generations (the safety latch may need to be removed on early generations)
- Mil-spec triggers supplied with MCX/MPX platforms, and single-stage mil-spec triggers without a U-notch or relief cut
- Not compatible: drop-in cassette triggers fitted to some MPX models, Geissele MCX/MPX triggers, the Sig Two Stage Match Duo AR trigger, skeletonized factory AR triggers with a U-notch, and the MPX Copperhead
Specifications
- Part Number: ADG-FRS-AMBI-X
- UPC: 850079014107
- Platform: Sig Sauer MCX / MPX
- Positions: Safe, Semi, Super-Semi
- Lever: Ambidextrous with lever blocker
- Material: Heat-treated 4140 steel
- Finish: Corrosion-resistant black nitride
- Origin: Made in the USA
