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

Overview

Designed exclusively for the HK MR223 and HK MR556 platform, the FRT-MR3™ single-stage (3-position) forced reset trigger for the HK MR223 & HK MR556 represents a precision-engineered upgrade from Rare Breed. This trigger system utilizes a forced-reset mechanism that returns the trigger shoe forward immediately after each shot, enabling a controlled, rapid follow-up cycle without modifying the host firearm’s bolt carrier group or buffer system. The three-position selector allows the operator to choose between safe, semi-automatic, and the forced-reset mode, providing a versatile interface for training, competition, or range use. Each unit is machined from billet steel and finished with a corrosion-resistant coating to withstand sustained firing schedules. The FRT-MR3™ single-stage (3-position) forced reset trigger for the HK MR223 & HK MR556 is a direct drop-in replacement requiring no permanent alterations to the lower receiver.

Features & Specs

• Manufacturer: Rare Breed | Category: Triggers | Platform: HK MR223, HK MR556
• Single-stage trigger pull weight calibrated at 4.5 to 5.5 pounds with a crisp, repeatable break point
• Three-position selector: safe, semi-automatic, and forced-reset mode (FRT)
• Drop-in design — no trigger guard modification, no filing, and no aftermarket hammer required
• Machined from 4140 billet steel with a QPQ nitride finish for corrosion resistance and wear longevity
• Includes steel trigger pins and a positive detent system for consistent selector engagement

Who It’s For

This trigger is intended for experienced HK MR223 and MR556 owners who demand a repeatable, single-stage interface with a mechanical forced-reset action. It suits competitive shooters participating in three-gun or tactical rifle matches who require a light, predictable trigger pull combined with a fast reset cycle. Law enforcement armorers and professional trainers evaluating platform-specific trigger upgrades will find the FRT-MR3™ single-stage (3-position) forced reset trigger for the HK MR223 & HK MR556 useful for controlled rapid-fire drills. It is not recommended for users unfamiliar with forced-reset trigger operation or those who do not regularly maintain their firearm’s bolt carrier and chamber lubrication. This product is built for shooters who prioritize mechanical consistency and repeatable performance over adjustable pull weights.

Shipping & FFL

The FRT-MR3™ single-stage (3-position) forced reset trigger for the HK MR223 & HK MR556 is classified as a firearm component and does not require a Federal Firearms License (FFL) transfer when shipped to a residence in states where this product is legal for ownership. However, state and local laws regarding forced-reset triggers vary; it is the buyer’s sole responsibility to verify compliance with all applicable statutes before ordering. Rare Breed triggers ship directly from our warehouse via a carrier requiring an adult signature upon delivery. We do not ship to P.O. boxes or APO/FPO addresses. Standard lead time is 3-5 business days for processing. If your state or municipality restricts the sale or possession of forced-reset triggers, please do not purchase this item. No returns or exchanges are accepted on installed trigger components. By completing this purchase, you confirm that you are 18 years of age or older and legally eligible to own this product.