Sig Trip Bar Kit for MCX Spear LT, Virtus, Rattler Compatible with FRT

Trip Bar Kit for MCX Spear LT, Virtus, and Rattler - FRT Compatible

The. Trip. Bar. Kit is a precision-machined component designed to work with. Rare. Breed FRT trigger systems on SIG MCX and MPX platforms. This kit includes the trip bar and retaining spring pins needed to enable forced reset trigger functionality on your MCX Spear LT, Virtus, Rattler, or MPX. It's built from 301 stainless steel and manufactured in-house using CNC precision for consistent performance and durability.

Key Features

• 301 stainless steel full hard construction for durability and corrosion resistance
• Precision CNC-machined in-house for tight tolerances and reliable fit
• Compatible with Rare Breed FRT trigger systems on MCX and MPX platforms
• Includes trip bar and two retaining spring pins
• USA manufactured

Perfect For

• MCX Spear LT builders upgrading to FRT trigger systems
• Virtus platform owners looking to install forced reset triggers
• Rattler shooters wanting faster trigger reset capability
• MPX users seeking FRT compatibility
• Builders who value precision-machined components and domestic manufacturing

FRT Trigger System Compatibility

The trip bar kit works specifically with. Rare. Breed FRT trigger systems across the MCX and MPX product line. This component enables the forced reset mechanism to function properly on your platform. The kit is not compatible with large-frame SIG Spear models chambered in .308 or .277 Fury, so verify your specific platform before ordering.

Precision Manufacturing and Materials

Built from 301 stainless steel full hard per AMS 5519 specification, this trip bar resists corrosion and handles the cycling demands of rapid-fire shooting. In-house CNC manufacturing ensures each component meets tight tolerances, which matters when working with trigger systems where fit directly affects reliability and function.

What You Need to Know

This is a component kit only. It does not include a trigger, lower receiver, or upper assembly. You'll need a compatible MCX or MPX platform and a Rare. Breed FRT trigger system for this kit to function. Installation requires basic mechanical knowledge and appropriate tools. Verify your specific platform compatibility before purchase, as this kit does not work with large-frame .308 or .277 Fury variants.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Verify compatibility with your specific platform before installation. Rare. Breed FRT trigger systems are legal under current federal law as of. December 2025, but always check your state and local regulations before purchasing or using any firearm component.