FRT-MR3™

Single-Stage 3-Position Forced Reset Trigger for HK MR223 & HK MR556 Platforms

Take your HK MR223 or HK MR556 platform to the next level with the official Rare Breed Triggers FRT-MR3™. Designed as a premium drop-in, duty-grade forced reset trigger system, the FRT-MR3™ delivers enhanced speed, precision, and control through advanced trigger engineering.

Manufactured and assembled in the USA, the FRT-MR3™ features a 3-position selector system with Safe, Semi-Automatic, and Forced Reset Trigger (FRT®) modes. Each unit includes a 3-position ambidextrous safety selector and anti-walk pins for a secure, reliable installation.

Performance Designed for HK Platforms

The FRT-MR3™ enhances the shooting experience with an innovative forced reset mechanism designed to improve trigger reset speed and consistency. The system mechanically resets the trigger after each shot, allowing for faster follow-up shots while maintaining full shooter control.

Each trigger pull is designed to fire one round, providing a controlled and predictable shooting experience ideal for competition shooting, training, and range applications.

Advanced Features & Design

3-Position Functionality

The FRT-MR3™ features a versatile 3-position ambidextrous selector system designed for both left- and right-handed shooters.

Selectable modes include:

• Safe Mode
• Semi-Automatic Mode
• Forced Reset Trigger (FRT®) Mode

Whether focusing on precision shooting or performance drills, the FRT-MR3™ provides adaptability and consistent operation.

Drop-In Installation

Engineered specifically for HK MR223 and HK MR556 platforms, the FRT-MR3™ includes anti-walk trigger pins to provide secure installation and help prevent unwanted movement during extended use.

The included ambidextrous selector provides smooth integration with compatible platforms for a clean, professional setup.

Single-Stage Trigger Performance

The FRT-MR3™ delivers a consistent single-stage trigger feel designed for speed, control, and repeatable performance.

Semi-Automatic Mode:

• Smooth single-stage trigger operation
• Consistent trigger travel
• Designed for precise control and rapid follow-up shots

Forced Reset Trigger (FRT®) Mode:

• Enhanced mechanical reset
• Consistent trigger operation
• Designed for improved shooting rhythm while maintaining individual shot control

Built for Durability

The FRT-MR3™ is constructed using premium materials selected for strength and reliability:

• 7075 anodized aluminum
• Heat-treated 4140 steel
• Heat-treated S7 steel components

This rugged construction provides long-lasting performance and reliability in demanding shooting environments.

HK MR223 & HK MR556 Compatibility

The FRT-MR3™ is specifically engineered for the HK MR223 and HK MR556 platforms.

It is designed to operate with the factory semi-automatic bolt carrier group (BCG) used with these systems.

For optimal performance and reliability:

• Retain the factory buffer system
• Retain the factory recoil spring
• Use the original factory-supplied semi-auto BCG

Compatibility Note:
The FRT-MR3™ is not compatible with HK416 or BRN4 full-auto bolt carrier groups.

Speed, Precision & Control

The FRT-MR3™ is built for shooters seeking improved performance from their HK MR223 or HK MR556 platform. By mechanically resetting the trigger after each shot and returning the trigger to the ready position, the system provides a faster and more consistent shooting experience.

The design allows each shot to remain individually controlled while delivering the performance advantages of forced reset technology.

Why Choose the FRT-MR3™?

The FRT-MR3™ Forced Reset Trigger is the ultimate upgrade for shooters looking to enhance their HK MR223 and HK MR556 experience. Combining advanced trigger technology, durable construction, and platform-specific engineering, the FRT-MR3™ delivers premium performance for competition, training, and range use.

Unlock the full potential of your HK platform with the FRT-MR3™.

Manufactured & Assembled in the USA