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 precision-engineered drop-in upgrade for shooters operating within the HK MR223 and MR556 platform. Manufactured by Rare Breed, this trigger assembly utilizes a forced-reset mechanism that returns the trigger forward immediately following a shot, enabling a rapid follow-up cadence while maintaining compliance with all applicable federal regulations. Built around a flat, single-stage shoe, the FRT-MR3 offers a consistent pull weight and a crisp break that eliminates over-travel, providing the operator with predictable, repeatable performance under dynamic conditions. This component is designed exclusively for the HK MR223 and MR556 variants, ensuring a seamless fit without requiring permanent modification to the host firearm.

Overview

The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is a purpose-built fire control system that introduces a third selectable position distinct from standard semi-automatic operation. In the forced-reset mode, the trigger mechanism resets the shoe forward under spring tension before the bolt carrier fully returns to battery, allowing the shooter to maintain a stable firing grip while achieving elevated cyclic rates through controlled trigger manipulation. The flat trigger profile reduces finger slip and provides a consistent contact surface across varying hand positions. Rare Breed has engineered this unit using heat-treated steel components and precision-machined internal geometry to withstand extended use in demanding training or competitive environments. The FRT-MR3 is not a binary trigger; it is a forced-reset design that requires deliberate finger control to operate effectively.

Features & Specs

This trigger system is manufactured to exacting tolerances for the HK MR223 and MR556 lower receivers. Below are the key specifications and design attributes that define the FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556:

• Three-position selector: SAFE, SEMI-AUTO, and FORCED RESET mode, with clear audible and tactile detent feedback for each position.
• Flat trigger shoe geometry: reduces trigger reach and provides a neutral finger placement, minimizing torque and improving shot-to-shot consistency.
• Single-stage pull weight: factory-set at approximately 4.5 to 5.0 pounds, with a short take-up and a defined wall before a clean break with zero over-travel.

• All-steel internal components: hammer, sear, disconnector, and springs are constructed from hardened tool steel with a corrosion-resistant finish for longevity.
• Drop-in design: no gunsmithing required for installation; direct replacement of the factory fire control group in MR223 and MR556 lower receivers.
• Compatibility: verified to function with standard and enhanced bolt carrier groups within the HK MR223 and MR556 platform without buffer weight or spring adjustments.

Who It’s For

The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is intended for experienced shooters who demand advanced fire control capabilities from their platform. This component is suitable for competitive shooters participating in action shooting sports where split times and trigger manipulation are scored variables. It is also appropriate for firearms instructors and training professionals who seek to demonstrate or practice controlled rapid fire techniques within legal parameters. Law enforcement and security personnel who train with the MR223 or MR556 platform may find the forced-reset mode beneficial for developing trigger discipline under simulated stress. This product is not recommended for novice shooters or those unfamiliar with forced-reset trigger mechanics, as proper operation requires understanding the specific reset cycle and maintaining consistent finger pressure throughout the firing sequence.

Shipping & FFL

This FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is classified as a firearm component and is not a firearm frame or receiver. As such, it ships directly to your residence or business address without requiring transfer through a Federal Firearms License (FFL) dealer. Standard shipping applies to all contiguous US states, with delivery typically occurring within 5 to 7 business days after order processing. International shipping, including to US territories, is not available for this item. Customers are responsible for verifying that their state and local laws permit the ownership and installation of forced-reset trigger systems prior to placing an order. Rare Breed and this retailer assume no liability for non-compliance with applicable statutes. By purchasing this product, you confirm that you are at least 18 years of age and legally eligible to own firearm components under all applicable federal, state, and local laws. No returns are accepted on installed or modified trigger assemblies.