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 designed specifically for the HK MR223 and MR556 platforms. Manufactured by Rare Breed, this trigger offers a three-position selector that provides a safe, semi-automatic, and forced-reset function. The FRT-MR3™ uses a patented forced-reset mechanism that returns the trigger forward after each shot, enabling a rapid cycling rate while maintaining shooter control. It is built to interface directly with the factory lower receiver of the HK MR223 and MR556 without modifications to the firearm. This trigger is intended for shooters who demand consistent reset characteristics and a single-stage pull weight optimized for speed.

Features & Specs

• Three-position selector: safe, semi-automatic, and forced-reset mode. The forced-reset position allows the trigger to reset forward automatically after each shot, reducing travel and enabling faster follow-up shots.
• Single-stage design with a crisp break. The pull weight is factory-set and tuned for reliability across the HK MR223 and MR556 platforms. No adjustment screws or user tuning required.
• Drop-in installation. No filing, fitting, or removal of material from the receiver. The FRT-MR3™ uses the factory hammer and trigger pins. Compatible with standard HK MR223 and MR556 lower receivers.
• Manufacturer: Rare Breed. Category: Triggers. Material: Steel and aluminum construction with a corrosion-resistant finish. Designed for duty and competition use.
• Includes complete trigger assembly, selector, and installation hardware. No additional parts or modifications needed for proper function in the HK MR223 or MR556.

Who It’s For

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is suited for shooters who want a consistent, repeatable trigger reset without the complexity of binary or full-auto systems. It is appropriate for competition shooters who need fast split times while maintaining semi-automatic compliance. It is also used by enthusiasts who train for speed and recoil management on the HK platform. This trigger is not recommended for shooters who prefer a traditional two-stage pull or a heavy trigger for precision slow-fire. It is designed for those who understand forced-reset technology and can safely operate the three-position selector. The FRT-MR3™ requires proper training and familiarity with the forced-reset function before live-fire use. It is not a replacement for standard semi-automatic triggers and should only be installed by individuals who have read the manufacturer instructions.

Shipping & FFL

This product ships directly to your address within the United States. No FFL transfer is required for this trigger as it is a firearm component and not a firearm receiver. However, state and local laws vary. The buyer is responsible for ensuring compliance with all applicable laws and regulations regarding the possession and installation of the FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556. Some states or municipalities may have restrictions on forced-reset triggers or three-position selectors. Check your local regulations before ordering. Rare Breed and this retailer do not assume liability for improper installation or use. If you have questions about legality in your area, consult a licensed firearms attorney. Standard shipping rates apply. Expedited options are available at checkout. This trigger is in stock and ready to ship.