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Trip Bar Kit for SIG MCX Spear LT, SIG Virtus & SIG Rattler – FRT Compatible
This precision-engineered trip bar kit is purpose-built for Rare Breed FRT trigger systems on SIG MCX and MPX platforms. It supplies the essential trip bar plus retaining spring pins that allow forced-reset trigger operation on the SIG MCX Spear LT, SIG Virtus, SIG Rattler, and SIG MPX. Fabricated from 301 stainless steel and CNC-machined in-house, the kit delivers consistent fit, reliable function, and long-term durability.
Key Features
- Full-hard 301 stainless steel construction for strength and corrosion resistance
- In-house CNC machining for tight tolerances and dependable performance
- Designed specifically for Rare Breed FRT triggers on MCX and MPX platforms
- Complete kit: trip bar + two retaining spring pins
- Made in the USA
Ideal For
- SIG MCX Spear LT owners converting to an FRT system
- SIG Virtus users installing a forced-reset trigger
- SIG Rattler shooters seeking quicker trigger reset
- SIG MPX builders adding FRT capability
- Anyone who prefers precision-machined, domestically produced parts
FRT Compatibility Notes
It is NOT compatible with large-frame SIG Spear rifles chambered in .308 or .277 Fury—confirm your exact model before ordering.
Important Details
This is a component kit only—it does not include a trigger, lower receiver, or upper assembly. You will need a compatible MCX or MPX firearm and a Rare Breed FRT trigger for the kit to work. Installation requires basic mechanical skills and the proper tools. Always verify platform compatibility prior to purchase; the kit WILL NOT fit large-frame .308 or .277 Fury variants.
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