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

If you own an HK MR223 or MR556, you already know the platform demands precision parts that can keep up with its robust action. The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is built to deliver a distinct shooting experience without compromising the reliability you expect from Rare Breed. This trigger is not a gimmick—it’s a purpose-designed upgrade that changes how you interact with the rifle’s cycle of operation.

Overview

The FRT-MR3™ uses a forced-reset mechanism that returns the trigger forward immediately after each shot, allowing your trigger finger to ride the reset naturally. With three selectable positions—safe, semi-automatic, and forced-reset—you get a versatile single-stage trigger that works with standard HK MR223 and MR556 lower receivers. It drops in without permanent modification, though professional installation is always recommended. This is the same engineering philosophy Rare Breed applied to their AR-15 triggers, now optimized for the HK platform’s unique bolt carrier group and hammer geometry.

Features & Specs

• Single-stage design with a crisp, consistent break at approximately 4.5 to 5.5 pounds pull weight
• Three-position selector: safe, semi-automatic, and forced-reset mode for the FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556
• Machined from billet steel and heat-treated for durability under high round counts

The trigger pack includes a dedicated hammer, disconnector, and trigger body that interface with your HK’s factory fire control pocket. No extra spacers or adapter plates are required, though you should verify your lower receiver’s pocket dimensions against the included fitment guide. The forced-reset position uses a spring-loaded cam that pushes the trigger shoe forward after the hammer drops, which requires deliberate finger control to maintain consistent cadence.

Who It’s For

This FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is for shooters who want to explore the forced-reset shooting technique on their HK-pattern rifle. It appeals to experienced enthusiasts who understand trigger manipulation and are comfortable with a non-traditional reset feel. If you run drills focused on speed, recoil management, or transition timing, the forced-reset mode can help train your finger to stay dynamic rather than lazy. It is not recommended for beginners or those who prefer a standard two-stage trigger for precision slow fire. Always check your local and state laws regarding forced-reset trigger ownership before purchase.

• Ideal for competitive shooters and HK enthusiasts experimenting with trigger dynamics
• Suits those who already own an MR223 or MR556 and want a drop-in upgrade without gunsmithing
• Best paired with proper training to safely and effectively use the forced-reset position

Shipping & FFL

This trigger ships directly to your door as it is a firearm component, not a receiver. However, some states and localities classify forced-reset triggers as regulated items. It is your responsibility to confirm that the FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is legal to possess in your jurisdiction. We ship via insured carrier with signature required. No returns on installed or modified triggers. If you have questions about compatibility with your specific MR223 or MR556 variant, contact our customer service team before ordering. All applicable federal, state, and local laws apply—no FFL transfer is required for this part, but compliance remains your duty.

• Direct-to-consumer shipping; no FFL needed for the trigger assembly itself
• Signature required on delivery; no PO boxes for this item
• Check your local laws before purchasing—we do not accept liability for non-compliance