FRT-MR3™ (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556

Designed specifically for the HK MR223 and HK MR556 platform, the FRT-MR3™ (Flat) Single-Stage (3-Position) Forced Reset Trigger represents a significant advancement in trigger system engineering. Manufactured by Rare Breed, this drop-in unit delivers a distinct mechanical advantage without compromising the integrity of your firearm. The FRT-MR3™ (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is built for shooters who demand precision, reliability, and a consistent reset cycle under rapid fire conditions. This component is not a standard trigger; it is a precision instrument designed to enhance the operational capabilities of your HK series rifle.

Overview

The FRT-MR3™ (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is a direct replacement trigger pack that requires no permanent modification to your firearm. Operating on a three-position selector, this trigger provides a safe mode, a semi-automatic mode, and a forced-reset mode where the trigger resets forward automatically after each shot, allowing the shooter to focus on trigger control and target acquisition. The flat-faced shoe reduces finger fatigue and provides a consistent pull angle, making it an ideal choice for competitive shooting, training, and tactical applications. Rare Breed has engineered this unit to meet the demands of serious shooters who require a mechanical advantage that is both repeatable and durable.

Features & Specs

• Single-stage flat trigger shoe designed specifically for HK MR223 and MR556 lower receivers, providing a crisp break and short reset with no take-up in forced-reset mode.
• Three-position selector (Safe, Semi-Automatic, Forced Reset) clearly marked for rapid identification, ensuring safe operation across all modes.
• Drop-in design with no permanent modifications required to the receiver, allowing for easy installation and removal by the end user with standard armorer tools.

• Manufactured by Rare Breed, a trusted name in aftermarket trigger systems, using high-grade steel and precision CNC machining for consistent performance.
• Compatible exclusively with HK MR223 and MR556 platforms; does not fit standard AR-15 or AR-10 pattern rifles.
• Includes all necessary springs, pins, and installation instructions for a complete drop-in installation process.

• Flat trigger shoe design reduces finger slip and provides a wider surface area for improved trigger discipline during sustained fire.
• Forced reset mechanism operates via a spring-loaded sear trip that resets the trigger forward after each round, allowing the shooter to control the firing cycle without relying on a traditional trigger reset.
• Tested for reliability with factory and defensive ammunition loads up to 62,000 PSI chamber pressure, ensuring function under real-world conditions.

Who It’s For

The FRT-MR3™ (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is intended for experienced shooters, competitive marksmen, and firearms professionals who own an HK MR223 or MR556. This trigger is not recommended for novice shooters or for use in hunting applications where single-shot precision is paramount. It is designed for range use, training environments, and competitive events where rapid, controlled fire is required. Law enforcement and military personnel who train with the HK MR556 will find this trigger system beneficial for drills that emphasize speed and accuracy. The FRT-MR3™ is a purpose-built component for those who understand the mechanics of forced-reset systems and wish to incorporate that technology into their HK platform.

Shipping & FFL

This product is classified as a firearm component and is not a firearm receiver. It may be shipped directly to your residence in most states. However, it is your responsibility to verify local, state, and federal laws regarding the purchase and possession of forced-reset trigger systems. Some jurisdictions, including but not limited to California, New York, New Jersey, Connecticut, Massachusetts, Washington D.C., and certain municipalities, may restrict the sale or possession of this item. We will not ship to states or localities where this product is prohibited by law. A Federal Firearms License (FFL) is not required for this trigger. By purchasing this item, you certify that you are legally eligible to own it under all applicable laws. Rare Breed Triggers and our company assume no liability for non-compliance with local regulations. Please check your local laws before ordering. All sales are final.