Description

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

Overview

If you own an HK MR223 or MR556 and have been searching for a trigger that walks the line between precision and speed, the FRT-MR3™ single-stage (3-position) forced reset trigger for the HK MR223 & HK MR556 is worth a hard look. Rare Breed designed this trigger specifically for the HK platform, meaning no guesswork, no filing, and no aftermarket adapters. It drops into your MR223 or MR556 lower and gives you three distinct positions: safe, semi-automatic, and a forced-reset mode that cycles the trigger shoe forward under spring tension after each shot. The reset is aggressive and tactile, so you can stay on target without breaking your grip. This is not a gimmick. It is a purpose-built component for shooters who want to push the HK platform beyond standard trigger performance.

Features & Specs

The FRT-MR3™ single-stage (3-position) forced reset trigger for the HK MR223 & HK MR556 is built around Rare Breed’s proven forced-reset geometry, but it is tuned for the specific hammer and sear dimensions of the HK MR223 and MR556. Here is what you get out of the box.

• Single-stage trigger pull with a crisp break and a short, positive reset in semi-automatic mode
• Third position (forced-reset mode) uses a cam-driven system that pushes the trigger shoe forward after each shot, enabling rapid follow-ups without bump-firing or binary mechanics
• Manufacturer: Rare Breed | Category: Triggers | Compatibility: HK MR223 and HK MR556 only

All internal components are machined from billet steel and finished with a corrosion-resistant coating. The trigger shoe is contoured for gloved or bare fingers, and the selector lever offers positive detent engagement in each position. No trigger job required. No springs to swap. Install it, function-check it, and run it.

Who It’s For

This trigger is for the HK owner who wants to explore the capability of the MR223 or MR556 without permanently modifying the firearm. It is ideal for competitive shooters who need fast splits in practical rifle matches, as well as for experienced enthusiasts who understand how forced-reset triggers work and how to maintain them. The FRT-MR3™ single-stage (3-position) forced reset trigger for the HK MR223 & HK MR556 is not a training wheel. It requires deliberate trigger control and a solid grip to run effectively. If you already own a Rare Breed trigger for an AR-15 and want to bring that same feel to your HK, this is the direct drop-in solution. It is also suited for collectors who shoot their HKs and want a trigger system that can be swapped back to factory configuration in minutes.

• Designed for HK MR223 and HK MR556 owners who want a dedicated forced-reset trigger with no adapter plates
• Suitable for competition, range drills, and advanced marksmanship where speed and accuracy must coexist
• Not recommended for first-time trigger swappers or shooters unfamiliar with forced-reset mechanics

Shipping & FFL

This item ships directly to your door. No FFL transfer is required because the FRT-MR3™ single-stage (3-position) forced reset trigger for the HK MR223 & HK MR556 is a firearm component, not a receiver or a complete firearm. However, you must be at least 18 years old to purchase trigger assemblies, and we reserve the right to verify age and compliance with all applicable state and local laws. Some states and municipalities have restrictions on forced-reset triggers, binary triggers, or rate-increasing devices. It is your responsibility to know the laws in your jurisdiction before placing an order. If your order is canceled due to legal restrictions, a refund minus a 15% restocking fee will be issued. We ship via UPS Ground or FedEx Ground, and tracking is provided as soon as the label is created. Typical transit time is 3 to 5 business days within the continental United States.

• No FFL transfer required for this trigger assembly
• Must be 18 or older to purchase
• Check local laws regarding forced-reset triggers before ordering