Description

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

The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 represents a significant advancement in trigger system engineering for the HK-platform rifle. Designed and manufactured by Rare Breed, this trigger delivers a distinct mechanical operating principle that separates it from conventional drop-in units. The FRT-MR3 is engineered specifically for the MR223 and MR556 lower receivers, ensuring proper fitment and reliable function without requiring permanent modification to the factory fire control pocket.

Overview

The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is a forced-reset mechanism that provides three selectable positions: Safe, Semi-Automatic, and a patented forced-reset mode. In forced-reset mode, the trigger resets forward under spring tension immediately following each shot, allowing the shooter to maintain a consistent trigger finger position throughout the firing cycle. This design reduces lock time and provides a repeatable break point. The flat trigger shoe offers a consistent face angle, which aids in maintaining a neutral wrist position during rapid strings of fire. Rare Breed has optimized the internal geometry to work with the HK MR223 and MR556 bolt carrier group and hammer interface.

Features & Specs

• Three-position selector: Safe, Semi-Automatic, and Forced Reset mode; the FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is machined from billet 7075-T6 aluminum with a Type III hard coat anodized finish
• Flat trigger shoe with a consistent 0.080-inch width; single-stage design with a factory-set pull weight of approximately 4.5 to 5.5 pounds as measured on a digital gauge
• All internal components, including the hammer, sear, and disconnect, are precision-machined from S7 tool steel with a black oxide coating for corrosion resistance

Who It’s For

This trigger system is intended for the experienced HK MR223 and MR556 owner who understands the mechanical operation of forced-reset triggers and has completed formal firearms training. It suits shooters who train regularly on controlled pairs, failure drills, and transitional shooting where consistent trigger manipulation is critical. The flat shoe profile is particularly beneficial for shooters with longer fingers or those who prefer a consistent pad placement without the curve of a traditional trigger. The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is not recommended for first-time AR-platform builders or for use in competition categories that restrict trigger mechanisms.

Shipping & FFL

This trigger is classified as a firearm component and does not require transfer through a Federal Firearms License (FFL) dealer for shipment to most states. However, it is the sole responsibility of the purchaser to verify that this trigger is legal to own and install in their specific jurisdiction. Some states and local municipalities have enacted restrictions on the possession or use of forced-reset trigger systems. Rare Breed and this retailer do not assume liability for compliance with state or local laws. By purchasing this product, you confirm that you are legally eligible to possess the FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556. Orders are processed within one business day and shipped via a carrier with adult signature required. No international shipping is available. All sales are final.