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

Overview

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 represents a precision-engineered upgrade for serious shooters. Manufactured by Rare Breed, this trigger system is designed specifically for the HK MR223 and HK MR556 platforms, offering a distinct three-position selector that provides standard semi-automatic operation, a forced-reset binary-like function, and a safe position. Unlike conventional triggers, the FRT-MR3™ utilizes a mechanical forced-reset mechanism that returns the trigger forward immediately after each shot, enabling rapid follow-up shots while maintaining full compliance with ATF guidelines. This unit is machined from heat-treated steel and undergoes rigorous quality control to ensure consistent performance under demanding conditions.

As a direct drop-in replacement for your factory trigger group, the FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 requires no permanent modification to your lower receiver. Rare Breed has engineered this trigger to match the exact pin dimensions and hammer geometry of the HK platform, ensuring reliable hammer fall and ignition with both mil-spec and match-grade ammunition. The single-stage design delivers a crisp, predictable break with no take-up or overtravel, providing the shooter with a tactile and audible reset that reinforces proper trigger discipline.

Features & Specs

• Three-position selector: Safe, Semi-Automatic, and Forced Reset (FR) mode for the HK MR223 and HK MR556
• Single-stage design with a factory-set pull weight of approximately 4.5 to 5.5 pounds
• Drop-in installation: no gunsmithing required; uses existing factory pins and hammer spring
• Heat-treated steel construction with a corrosion-resistant phosphate finish
• Includes complete trigger group: trigger shoe, disconnector, hammer, and selector
• Designed exclusively for the HK MR223 and HK MR556 lower receivers; not compatible with AR-15 or other platforms
• Manufacturer: Rare Breed | Category: Triggers

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 operates on a mechanical principle that resets the trigger shoe forward under spring tension after each hammer fall. In forced reset mode, the shooter must maintain positive finger pressure on the trigger while allowing the mechanism to return forward, then press again to fire. This setup enables rapid stringing of shots while keeping the shooter in full control of each round. The single-stage design eliminates the vagaries of two-stage triggers, providing a consistent pull every time.

Who It’s For

This trigger is built for HK MR223 and HK MR556 owners who demand higher cyclic capability without sacrificing reliability or safety. It is ideal for competitive shooters in disciplines that allow forced-reset triggers, as well as for law enforcement and military professionals who train for rapid target engagement. The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 also appeals to collectors and enthusiasts who want to explore the mechanical performance of their HK rifles beyond standard semi-automatic operation. If you are a shooter who values precision engineering, consistent trigger pull, and a platform-specific upgrade that does not require permanent alteration, this trigger is the appropriate choice.

Note that forced-reset triggers require the user to understand and practice the specific manipulation technique for optimal performance. The mechanism is not a binary trigger nor a full-auto conversion; it is a semi-automatic trigger that resets the shoe forward mechanically rather than relying solely on the shooter’s finger release. This distinction makes the FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 a unique tool for those who appreciate the engineering behind high-speed semi-automatic fire.

Shipping & FFL

This FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is a firearm component and ships directly to your doorstep. No Federal Firearms License (FFL) transfer is required for this trigger assembly as it is not a firearm receiver or a complete weapon. Standard shipping rates apply, and we ship within 1-3 business days of order processing. International shipping is not available. All sales are final; please verify compatibility with your HK MR223 or HK MR556 lower receiver before purchase. By ordering, you confirm that you are at least 18 years of age and that possession of this product is legal in your state and local jurisdiction. We reserve the right to cancel any order that violates applicable laws. For questions regarding installation or compliance, contact our customer service team prior to purchase.