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 is a precision-engineered drop-in component from Rare Breed. Designed specifically for the HK MR223 and MR556 platforms, this forced reset trigger delivers a single-stage, three-position operating system. It provides the shooter with a measurable, repeatable trigger cycle that resets through forward motion of the trigger shoe, enabling rapid follow-up shots without modifying the firearm’s internal fire control group. This product is built to factory specifications and requires no permanent alteration to your rifle.

Overview

The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 replaces the factory trigger assembly with a purpose-built unit that uses a forced-reset mechanism. In the standard semi-automatic position, the trigger operates as a single-stage drop-in. In the forced-reset position, the trigger shoe physically resets forward after each shot, requiring the shooter to release and re-apply pressure. This design allows for a controlled, cyclic rate that is entirely dependent on the shooter’s input. The trigger is machined from billet steel and finished with a corrosion-resistant coating. Every unit is test-fired by Rare Breed before shipment.

Features & Specs

• Manufacturer: Rare Breed. Category: Triggers. Included components: trigger assembly, hammer, disconnector, trigger pins, and installation instructions.
• Three-position selector: safe, semi-automatic, and forced-reset. The forced-reset position is mechanically distinct from standard binary or full-auto fire.
• Flat trigger shoe profile with a consistent pull weight of approximately 4.5 to 5.0 pounds. Minimal take-up and a crisp break point.

Additional specifications include a drop-in design that fits standard HK MR223 and MR556 lower receivers. No gunsmith fitting or modification to the lower receiver is required. The trigger uses MIL-SPEC hammer and trigger pins. The housing is CNC-machined from 7075-T6 aluminum and hardcoat anodized to match factory HK finishes. The sear surfaces are EDM-cut for precision engagement. The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is compatible with factory safety selectors and standard trigger guards.

• Material: 7075-T6 aluminum housing, billet steel trigger and hammer components.
• Finish: Type III hardcoat anodized housing, manganese phosphate or QPQ coated steel parts.
• Weight: Approximately 3.2 ounces, complete assembly.

Who It’s For

This trigger is intended for competitive shooters, firearms enthusiasts, and HK platform owners who want a non-standard trigger cycle for range use or training. It is also suited for those who prefer a flat trigger shoe geometry for consistent finger placement. The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is not designed for law enforcement or military duty use. It is a consumer-grade product for lawful civilian ownership in jurisdictions where such components are legal. Users should verify compliance with all local, state, and federal laws before purchase or installation.

• Designed for the HK MR223 and HK MR556 platforms only. Not compatible with AR-15 or other HK variants without modification.
• Suitable for shooters who understand forced-reset trigger operation and can safely manage the cyclic rate.
• Recommended for experienced firearms owners who can perform a simple drop-in installation.

Shipping & FFL

This product may be shipped directly to your residence in most states, as it is a firearm component and not a receiver or complete firearm. However, some jurisdictions require that triggers be transferred through a Federal Firearms License (FFL) holder. It is your responsibility to know and comply with all applicable laws regarding the purchase, possession, and installation of this trigger. Rare Breed and our retailer do not provide legal advice. By purchasing the FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556, you confirm that you are legally allowed to own this item in your jurisdiction. Standard shipping rates apply. Expedited options are available at checkout.