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

Overview

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is a precision drop-in trigger system engineered by Rare Breed specifically for the HK MR223 and HK MR556 platform. This forced reset trigger utilizes a three-position selector that provides semi-automatic, safe, and forced-reset functionality. Each unit is machined from billet 7075-T6 aluminum and features a hardened steel hammer and sear assembly. The FRT-MR3™ is designed as a direct replacement for the factory trigger pack, requiring no permanent modification to the host firearm. This trigger system operates on a mechanical forced-reset principle where the trigger resets forward under spring tension as the bolt carrier cycles, enabling rapid follow-up shots while maintaining single-shot per trigger pull compliance.

Features & Specs

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 offers a single-stage pull weight of approximately 4.5 to 5.5 pounds with a crisp break and minimal overtravel. The three-position selector includes safe, semi-automatic, and forced-reset positions. The forced-reset function requires the shooter to release the trigger fully between shots to allow the sear to re-engage. This trigger is manufactured by Rare Breed under their FRT-MR product line and is classified as a trigger assembly in the firearms component category.

• Drop-in design for HK MR223 and HK MR556 rifles; no gunsmithing required for installation
• Three-position selector: Safe, Semi, and Forced Reset (3-position configuration)
• Billet 7075-T6 aluminum housing with hardened steel internal components and nickel-Teflon coated hammer

• Single-stage trigger pull: 4.5-5.5 pounds (factory specification)
• Compatible with factory HK MR223 and HK MR556 bolt carrier groups and upper receivers
• Includes all necessary springs, pins, and selector components for complete installation

• Mechanical forced-reset operation: trigger resets under spring pressure from bolt carrier movement
• No modification to lower receiver required; uses existing trigger pocket dimensions
• Manufactured in the United States by Rare Breed, category: Triggers

Who It’s For

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is intended for experienced shooters and competitive marksmen who own HK MR223 or HK MR556 rifles. This trigger system is designed for shooters who require rapid shot cycling while maintaining precise control over each trigger pull. The forced-reset mechanism requires deliberate trigger finger discipline and is best suited for users familiar with trigger manipulation under recoil. Law enforcement, tactical shooters, and enthusiasts who train for speed shooting drills will find the FRT-MR3’s consistent reset characteristics beneficial for cadence control. This product is not recommended for novice shooters or those unfamiliar with forced-reset trigger operation.

Shipping & FFL

This FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is classified as a firearm component and ships directly to your residential or business address within Florida. No Federal Firearms License (FFL) transfer is required for this trigger assembly as it is not a firearm frame or receiver. However, Rare Breed and our retailer comply with all applicable federal, state, and local laws. Customers are responsible for verifying that this product is legal to own in their specific jurisdiction. For Florida residents, this trigger is legal for purchase and installation in privately owned firearms. We recommend consulting with a qualified firearms attorney if you have questions regarding compliance with local ordinances.