Description

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 exclusively for HK-pattern rifles chambered in 5.56 NATO. Manufactured by Rare Breed, this trigger represents a significant advancement in forced-reset technology, offering the shooter three distinct selector positions: Safe, Semi-Automatic, and Forced Reset. Unlike conventional triggers, the FRT-MR3™ utilizes a patented forced-reset mechanism that physically returns the trigger forward after each shot, enabling rapid follow-up shots while maintaining full semi-automatic compliance. This system is built to the exacting tolerances required by the HK MR223 and MR556 platforms, ensuring reliable function across a wide range of ammunition types and environmental conditions. For shooters who demand maximum performance from their HK rifle, the FRT-MR3™ delivers a consistent, repeatable trigger pull with zero take-up and a crisp break at the same point every cycle.

Features & Specs

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is constructed from heat-treated steel components with a corrosion-resistant finish, designed to withstand thousands of rounds without degradation. Each unit undergoes individual quality inspection at Rare Breed’s facility before shipment. The trigger pack includes a reinforced hammer, disconnector, and sear assembly, all CNC-machined to military-grade specifications. The housing is precision-milled from 7075-T6 aluminum and hardcoat anodized for durability. Installation requires no permanent modification to the host firearm and is completed in minutes using standard tools.

• Three-position selector: Safe, Semi-Automatic, and Forced Reset modes
• Single-stage trigger with zero take-up and consistent pull weight of 4.5 to 5.5 pounds
• Includes two proprietary Rare Breed springs, stainless steel pins, and full installation hardware
• Compatible exclusively with HK MR223 and HK MR556 lower receivers
• Drop-in design with no gunsmith fitting required for properly in-spec receivers

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, competitive marksmen, and firearms professionals who own HK-pattern rifles and seek enhanced trigger performance without sacrificing reliability. This product is designed for those who understand the mechanical operation of forced-reset trigger systems and have the training to employ them effectively. It is not recommended for novice shooters or for use in firearms that are not specifically listed as compatible. The FRT-MR3™ is a specialized component for the HK MR223 and MR556 platforms only; installation in other firearms may result in malfunction or unsafe operation. Users should be familiar with their local, state, and federal laws regarding trigger mechanisms before purchase.

• Owners of HK MR223 or HK MR556 rifles seeking a performance upgrade
• Competitive shooters in disciplines that allow forced-reset triggers
• Firearms professionals requiring consistent, repeatable trigger function
• Enthusiasts who prioritize mechanical precision and build quality

Shipping & FFL

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is classified as a firearm component and ships directly to your residence or business. No Federal Firearms License (FFL) transfer is required for this trigger assembly, as it is not a firearm frame or receiver. However, it is the purchaser’s sole responsibility to verify that this product is legal to own and install in their jurisdiction. Some states and local municipalities have restrictions on forced-reset triggers or binary-style firing systems. Rare Breed and our retail partners assume no liability for compliance with local laws. Standard shipping rates apply, with tracking provided upon dispatch. Expedited shipping is available at checkout. All sales are final on trigger assemblies once the factory seal is broken. For warranty and service inquiries, contact Rare Breed directly using the information included with your shipment.

• No FFL transfer required for this trigger assembly
• Purchaser must verify legality in their state and local jurisdiction
• Standard ground shipping included; expedited options available at checkout
• All sales final on opened trigger packs; unopened returns accepted within 30 days