Description

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

Developed by Rare Breed specifically for the HK MR223 and HK MR556 platforms, the FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger represents a precision-engineered upgrade for the discerning shooter. This trigger system leverages a forced-reset mechanism that reduces lock time and allows for rapid follow-up shots without compromising the inherent accuracy of your HK-pattern rifle. Designed to meet the rigorous demands of both competitive shooting and tactical applications, the FRT-MR3 is a drop-in component that transforms the trigger feel of your MR-series firearm.

Overview

The FRT-MR3 is a single-stage, three-position forced reset trigger that operates on a distinct mechanical principle. Unlike traditional binary or standard semi-automatic triggers, the FRT-MR3 forces the trigger forward after each shot, requiring the shooter to release pressure for the sear to reset. This design delivers a precise, consistent break in the single-stage position, while the third position enables a more aggressive cyclic rate when paired with proper shooter technique. Built exclusively for the HK MR223 and MR556, this trigger maintains the platform’s reliability and is machined to exacting tolerances for a seamless fit within the factory lower receiver.

Features & Specs

Rare Breed has engineered the FRT-MR3 with a focus on material integrity and mechanical precision. The flat trigger shoe provides a consistent finger placement point, reducing pull variation across different shooting positions. Below are the core specifications and features of this trigger system.

• Manufacturer: Rare Breed; Category: Triggers; Platform-specific design for HK MR223 and HK MR556 only
• Three-position selector: Safe, Semi-automatic (single-stage), and Forced Reset (third position)
• Flat trigger shoe geometry for optimized trigger finger placement and consistent pull weight
• Single-stage design with a crisp, defined break and minimal overtravel
• Constructed from heat-treated steel and aircraft-grade aluminum components for long-term durability
• Drop-in installation; no permanent modification to the factory lower receiver required
• Compatible with standard HK MR223 and MR556 fire control group pockets

The forced reset mechanism functions by utilizing the bolt carrier’s rearward travel to physically reset the trigger forward, allowing the shooter to maintain a constant firing rhythm. Each pull in the forced reset position delivers a repeatable, clean break. The FRT-MR3 is not a binary trigger; it is a single-stage trigger with a mechanically assisted reset in the third position. All components are finished with a corrosion-resistant coating suitable for field conditions.

Who It Is For

This trigger is designed for experienced shooters who demand mechanical consistency and rapid follow-up capability from their HK MR223 or MR556. It is ideal for competitive shooters in disciplines that reward split-second target transitions, as well as for law enforcement and military personnel who require a trigger that reduces the time between shots without sacrificing precision. Enthusiasts who appreciate the engineering behind forced reset mechanisms and seek a drop-in upgrade that retains the factory platform’s reliability will find the FRT-MR3 a logical addition. It is not intended for novice shooters or for use in standard AR-15 platforms, as the geometry is specific to the HK MR-series lower receiver dimensions.

• Competition shooters using HK MR223 or MR556 rifles in action shooting sports
• Professional users requiring a repeatable, high-speed trigger cycle
• HK platform enthusiasts seeking a specification-driven upgrade from a trusted manufacturer

Before purchasing, verify that your firearm is an HK MR223 or MR556, as this trigger will not function in other AR-15 variants without significant modification. The FRT-MR3 is a component for firearms that are legally owned and operated in compliance with all applicable laws.

Shipping & FFL

This product is classified as a firearm component and is subject to federal regulations. The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 will ship directly to your address; however, it must be transferred through a Federal Firearms License (FFL) dealer if required by your state or local jurisdiction. Rare Breed and this retailer comply with all Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) rulings. It is your responsibility to ensure that the purchase and possession of this trigger are legal in your area. Please have your chosen FFL dealer’s information ready at checkout. Some states restrict the sale or possession of forced reset triggers; verify your local laws prior to ordering.

• Must ship to a valid FFL dealer unless otherwise exempted by federal law
• Customer is responsible for all applicable transfer fees and background check requirements
• No shipments to locations where forced reset triggers are prohibited by statute or regulation