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 is a precision-engineered drop-in trigger system from Rare Breed. Designed specifically for the HK MR223 and HK MR556 platforms, this forced reset trigger delivers a distinct shooting experience by combining a crisp single-stage break with a mechanical forced-reset function that returns the trigger forward immediately after each shot. The three-position selector allows the operator to choose between safe, semi-automatic, and forced-reset modes, providing tactical versatility without modifying the host firearm’s lower receiver. This unit is manufactured to military-grade tolerances and fits standard HK MR223 and MR556 trigger pockets with no permanent alterations required.

Features & Specs

• Three-position selector: safe, semi-automatic (standard trigger function), and forced-reset mode for rapid follow-up shots
• Single-stage trigger pull with a consistent break weight of approximately 4.5 pounds in forced-reset mode
• Drop-in design: no gunsmithing, drilling, or permanent modifications needed for installation into HK MR223 and MR556 lower receivers
• Manufactured from heat-treated steel and aerospace-grade aluminum with a corrosion-resistant black nitride finish
• Includes all necessary pins, springs, and installation tooling in a sealed retail package

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is built to Rare Breed’s exacting quality standards. Each unit is function-tested prior to shipment and is compatible with standard mil-spec hammer and trigger pins. The forced-reset mechanism uses a patented cam system that mechanically resets the trigger shoe after each cycle, allowing the shooter to maintain positive trigger control without relying on the bolt carrier’s return spring force alone. This trigger is classified under current ATF guidelines as a firearm component and does not constitute a machinegun when installed in a semi-automatic rifle.

Who It’s For

This trigger is intended for experienced shooters and competitive marksmen who operate HK MR223 or MR556 rifles and require a performance advantage in rapid-fire scenarios. Three-gun competitors, tactical training instructors, and law enforcement personnel will benefit from the forced-reset function’s ability to reduce split times between shots. It is also suitable for responsible civilian owners who understand the mechanical operation of forced-reset triggers and comply with all applicable federal, state, and local laws. The FRT-MR3™ is not recommended for novice shooters or those unfamiliar with forced-reset trigger systems, as proper training is essential for safe and effective use.

Shipping & FFL

This FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 ships directly to your doorstep as a firearm component. No Federal Firearms License (FFL) transfer is required for purchase within the United States. However, you must comply with all state and local laws regarding trigger components and forced-reset mechanisms. Some jurisdictions restrict or prohibit the possession or use of forced-reset triggers. It is your sole responsibility to verify that this product is legal to own and use in your location before placing an order. We reserve the right to cancel any order that cannot be legally fulfilled. All sales are final on installed or modified components. Standard shipping rates apply; expedited options are available at checkout.