Description

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

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 represents a precision-engineered upgrade for owners of these specific HK-pattern semi-automatic rifles. Manufactured by Rare Breed, this trigger assembly is designed exclusively for the MR223 and MR556 platforms, offering a distinct three-position selector configuration that includes a safe, semi-automatic, and forced-reset function. Each unit is built to tight tolerances using heat-treated steel components and aerospace-grade polymers to ensure consistent performance under sustained firing schedules.

Overview

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 operates on a mechanical forced-reset principle that physically returns the trigger forward after each shot, regardless of shooter input. This design eliminates the need for a traditional disconnector in the forced-reset position, reducing the number of moving parts within the trigger pack. The single-stage pull weight is factory-set at approximately 4.5 to 5.5 pounds, with a crisp break and minimal overtravel. The three-position selector is clearly marked and provides positive detent engagement at each stop. This trigger is not a binary trigger; it functions as a semi-automatic trigger in position two and utilizes the forced-reset mechanism only in position three.

Features & Specs

• Three-position selector: Safe, Semi-Automatic, and Forced Reset. The forced-reset position mechanically returns the trigger forward after each hammer fall, allowing the shooter to maintain a constant trigger finger pressure while the mechanism cycles.
• Single-stage design with a factory pull weight of 4.5-5.5 pounds. The trigger shoe features a flat-faced profile with serrated texture for consistent finger placement. Hammer and trigger are machined from S7 tool steel, heat-treated to Rockwell 48-52.
• Drop-in installation for HK MR223 and HK MR556 lower receivers. No permanent modification to the firearm is required. Includes all necessary pins, springs, and instructions. Compatible with factory safety selectors and aftermarket ambidextrous selectors designed for the HK416-pattern trigger pocket.

Who It’s For

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is intended for experienced shooters who own an HK MR223 or MR556 rifle and seek a trigger system that offers a distinct mechanical cycling feel. This product is suitable for competitive shooters in divisions that permit forced-reset triggers, as well as for enthusiasts who want to explore the forced-reset trigger function on their HK-pattern platform. It is not designed for defensive use, nor is it recommended for shooters unfamiliar with forced-reset trigger mechanics. Users should have a solid understanding of safe firearm handling and trigger discipline before operating this trigger in the forced-reset position.

Shipping & FFL

This FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is classified as a firearm component and not a firearm receiver. Accordingly, it ships directly to your residential or business address with no requirement for transfer through a Federal Firearms Licensee (FFL). Standard shipping is via UPS Ground or USPS Priority Mail, with tracking provided upon fulfillment. California customers are advised that forced-reset triggers are subject to state-level regulation. It is the buyer’s sole responsibility to verify that this product complies with all applicable local, state, and federal laws prior to purchase. No returns are accepted on installed or modified trigger assemblies.