FRT-MR3™ Forced Reset Trigger for the HK MR223 & HK MR556

FRT-MR3™ Forced Reset Trigger for HK MR223 & HK MR556

The FRT-MR3™ Forced Reset Trigger is a high-performance drop-in trigger system designed specifically for the HK MR223 and HK MR556 platforms. Engineered for enhanced responsiveness and consistent operation, it is built to improve shooting efficiency while maintaining compliance with applicable legal standards. Proudly manufactured and assembled in the USA, the FRT-MR3 is developed for users seeking a premium upgrade for tactical and competitive use.

Enhanced Performance for HK MR Platforms

The FRT-MR3 Forced Reset Trigger is designed to improve firing speed and control through a mechanical reset system. After each shot, the trigger automatically resets using the firearm’s cycling action, allowing for quicker and more consistent follow-up shots.

Each round is fired individually, ensuring controlled operation while improving overall shooting rhythm and responsiveness. This makes it suitable for both training environments and performance-focused shooting applications.

Key Features of the FRT-MR3 System

3-Position Ambidextrous Control

The trigger system includes a three-position safety selector, offering:

• Safe

• Semi-Automatic

• Forced Reset Mode

This ambidextrous configuration supports both left- and right-handed users for improved accessibility and control.

Drop-In Installation Design

The FRT-MR3 is engineered for secure installation with compatible MIL-SPEC lower receivers and includes:

• Anti-walk pins for added stability

• Ambidextrous selector integration

• Drop-in compatibility for streamlined setup

Durable Construction

Built from premium materials including 7075 anodized aluminum and heat-treated steel components, the system is designed for long-term durability and consistent performance under repeated use.

Platform-Specific Compatibility

The FRT-MR3 is designed exclusively for the HK MR223 and HK MR556, operating with factory semi-automatic bolt carrier group configurations for proper function and reliability.

Faster Shooting with Mechanical Reset Technology

The forced reset mechanism allows the trigger to automatically reset after each shot, remaining in position until the bolt carrier returns to battery. This reduces reset time and enables faster, more controlled follow-up shots without requiring complex trigger manipulation.

Why Choose the FRT-MR3™

The FRT-MR3 is ideal for users looking to enhance performance on HK MR platforms. Key advantages include:

• Improved shot-to-shot speed through forced reset mechanics

• Stable and secure drop-in installation

• Ambidextrous 3-position control system

• Durable, duty-grade construction materials

• Platform-specific engineering for HK MR223 and MR556

Whether used for training, competition, or recreational shooting, it delivers a refined and responsive trigger experience.

Manufactured in the USA

The FRT-MR3™ is proudly manufactured and assembled in the United States, ensuring strict quality standards and reliable craftsmanship.