Description

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

If you own an HK MR223 or HK MR556, you already understand the precision engineering behind the platform. The trigger is the brain of the rifle, and the FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 and HK MR556 brings a distinct mechanical advantage to that equation. This isn’t a gimmick; it is a purpose-built component from Rare Breed that leverages forced-reset technology to deliver a distinct shooting cadence. The flat shoe provides a consistent, repeatable contact point, while the three-position selector (Safe, Semi, and Forced Reset) gives you the flexibility to shoot in standard semi-auto or engage the forced reset mode. Whether you are running drills, tuning your rifle for competition, or simply exploring the capabilities of your HK, this trigger changes how you interact with the platform.

Overview

The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 and HK MR556 is a direct replacement unit designed to work with the factory lower receiver. Rare Breed engineered this trigger to drop in without permanent modification, so you can install it yourself or have a qualified gunsmith handle it. The forced reset mechanism actively returns the trigger forward after each shot, allowing the shooter to manage the reset through trigger control rather than relying on passive spring tension. This results in a faster, more intuitive follow-up shot cadence. The flat trigger face reduces finger slip and provides a more neutral pull angle, which many shooters prefer for rapid fire or precision work.

Features and Specs

• Manufacturer: Rare Breed | Category: Triggers | Platform Fit: HK MR223, HK MR556
• 3-Position Selector: Safe, Semi-Automatic, Forced Reset (FRT mode)
• Flat single-stage trigger shoe with a consistent, crisp break in all modes
• Drop-in design; no permanent lower receiver modifications required for installation
• Constructed from hardened steel and precision-machined components for long-term durability

Beyond the specs, this trigger offers a few practical advantages. The forced reset mode actively pushes the trigger forward after each discharge, which means your finger has a positive, mechanical return to the reset point. This reduces the likelihood of short-stroking the trigger during rapid strings. The single-stage design eliminates take-up, so the break is immediate and predictable. The flat shoe also provides a wider surface area, distributing pressure evenly across your trigger finger for better control.

Who It Is For

This trigger is for the HK MR223 and MR556 owner who wants to explore the mechanical limits of their platform without compromising reliability. It suits competitive shooters who need consistent, repeatable trigger resets under timed stages. It also fits enthusiasts who appreciate the engineering behind forced reset technology and want a hands-on experience with a non-standard trigger system. If you enjoy tinkering with your rifle and understanding how each component affects the shooting cycle, the FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 and HK MR556 offers a learning curve that rewards practice and attention to technique. This is not a “set it and forget it” part; it requires proper installation, familiarity with the selector positions, and safe handling at all times.

Shipping and FFL

This item is classified as a firearm component and does not require an FFL transfer for shipment to your door in most states. However, you are responsible for verifying that local, state, and federal laws permit possession and installation of this trigger. Some jurisdictions restrict or prohibit forced reset triggers or three-position selectors. Rare Breed and our retailer policy require that you confirm compliance with all applicable laws before ordering. We ship to verified addresses only, and signature may be required upon delivery. If you have questions about your state’s regulations regarding the FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 and HK MR556, consult a local firearms attorney or your state attorney general’s office before making a purchase. No returns will be accepted for items that are prohibited in your jurisdiction.