About this product

FRT-MR3™ Forced Reset Trigger Single-Stage · 3-Position · HK MR223 & MR556 HK MR223 HK MR556 The FRT-MR3™ brings the patented forced reset trigger experience to the HK MR223 and HK MR556 for the first time. Engineered by Rare Breed Triggers , it delivers three selectable positions — Safe, Semi-Auto, and Forced Reset — in a single drop-in assembly purpose-built for the HK MR-s Ships to all 50 states. Available nationwide.

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 leverages the company’s proven forced-reset technology to deliver a distinct, repeatable shooting cycle that maximizes control and speed. The three-position selector allows the operator to choose between safe, semi-automatic, and forced-reset modes, providing a tactical advantage without compromising platform reliability. Built for the MR223 and MR556 platforms, this trigger maintains OEM safety specifications while introducing a novel mechanical function that resets the trigger forward under spring tension after each shot, enabling rapid follow-up shots with minimal finger movement.

Features & Specs

• Three-position selector: safe, semi-automatic, and forced-reset mode for the HK MR223 & MR556
• Single-stage design with a clean, crisp break and consistent reset point
• Drop-in installation requires no permanent modification to the host firearm
• Constructed from heat-treated steel and hardened aluminum components for durability
• Compatible with standard HK MR223 and MR556 lower receivers without additional fitting
• Rare Breed engineering ensures the trigger resets forward automatically after each discharge
• Includes all necessary pins, springs, and selector components for a complete swap

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & MR556 is manufactured to exacting tolerances, ensuring consistent performance across a wide range of ammunition types and shooting conditions. The trigger pull weight is factory-set and non-adjustable, calibrated to optimize the forced-reset cycle while maintaining a safe, predictable break.

Who It’s For

This trigger is intended for experienced shooters and competitive marksmen who demand higher cyclic potential from their HK MR223 or MR556 platform without resorting to full-automatic conversion. The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & MR556 is suitable for range training, tactical drills, and speed-focused competitions where rapid target transitions are critical. Shooters who already own Rare Breed triggers in other platforms will appreciate the familiar operating logic, while those new to forced-reset systems should familiarize themselves with proper finger discipline and trigger manipulation before live-fire use. This product is not designed for hunting, law enforcement patrol, or defensive carry applications where a standard trigger may be more appropriate.

Shipping & FFL Transfer

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & MR556 is classified as a firearm component and ships directly to your doorstep without a Federal Firearms License (FFL) transfer, as it is not a complete firearm or a regulated receiver. However, local, state, and federal laws vary regarding trigger assemblies and forced-reset mechanisms. It is the buyer’s sole responsibility to verify that possession and use of this trigger comply with all applicable laws in their jurisdiction. Some states or municipalities may restrict or prohibit forced-reset triggers; check your local statutes before ordering. Rare Breed and this retailer assume no liability for improper installation, misuse, or legal consequences. All sales are final. Standard shipping rates apply, and delivery typically occurs within 5-10 business days to contiguous US addresses. International shipping, Hawaii, Alaska, and US territories are not available for this product. By purchasing the FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & MR556, you confirm that you are at least 18 years of age and legally eligible to own firearm components.