Description

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-engineered drop-in trigger system designed exclusively for HK-pattern rifles. Manufactured by Rare Breed, this trigger represents a distinct category of performance upgrade for the MR223 and MR556 platforms. Operating on a forced-reset mechanism, the FRT-MR3™ provides a single-stage pull with three selectable positions: safe, semi-automatic, and forced-reset. Shooters familiar with the FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 will recognize its ability to deliver consistent reset characteristics without modifying the host firearm’s lower receiver. This trigger is built to the same material and tolerances standards as Rare Breed’s other duty-grade components, ensuring compatibility with mil-spec hammer and trigger pins.

Features & Specs

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is manufactured from heat-treated steel components with a corrosion-resistant black nitride finish. The trigger uses a captive hammer and sear assembly that installs without pins or set screws, requiring only standard hand tools for installation. The forced-reset position cycles the hammer forward immediately after bolt closure, allowing the shooter to maintain trigger control through the entire firing cycle. Below are the key specifications for this Rare Breed trigger system.

• Manufacturer: Rare Breed; Category: Triggers; Platform: HK MR223 and HK MR556
• Three-position selector: safe, semi-automatic, and forced-reset mode
• Single-stage pull weight: factory set at approximately 4.5 pounds, consistent across all three positions
• Drop-in design: no permanent modification required to the lower receiver; uses existing factory hammer and trigger pins
• Includes: trigger shoe, hammer, sear, disconnector, selector, and all internal springs; packaged with installation instructions

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 has undergone functional testing with standard pressure .223 Remington and 5.56 NATO ammunition. The trigger is designed to function with factory-spec hammer springs and does not require aftermarket buffer weights or adjustable gas blocks for reliable operation.

• Material: 8620 steel hammer and sear; 4140 steel trigger shoe; black nitride finish per MIL-SPEC standards
• Dimensions: fits standard HK MR223 and MR556 trigger pocket; no spacer plates required
• Weight: approximately 3.2 ounces complete assembly
• Warranty: limited lifetime warranty against manufacturing defects from Rare Breed

Who It’s For

This trigger is intended for experienced shooters who own an HK MR223 or HK MR556 and want a single-stage trigger system with a distinct forced-reset function. The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is appropriate for competitive shooters, firearms instructors, and enthusiasts who understand the mechanical operation of forced-reset triggers and maintain proficiency with their firearm’s manual of arms. It is not recommended for novice shooters or for use in firearms that have not been verified as compatible by the end user. Rare Breed designed this trigger for shooters who prioritize consistent trigger reset and who train regularly with their equipment.

• Compatible with: HK MR223, HK MR556, and variants using standard HK-pattern trigger packs
• Not compatible with: AR-15, AR-10, or any non-HK platform without verified fitment
• Installation time: approximately 10 minutes with standard roll pin punches and a non-marring hammer

Shipping & FFL

This product is classified as a firearm component and is not a firearm. It ships directly to your address with no FFL transfer required. However, the FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is subject to all applicable federal, state, and local laws. You are responsible for verifying that this trigger is legal to own and install in your jurisdiction before placing an order. We ship via UPS Ground or FedEx Ground with adult signature required. No international shipping. We do not accept returns on installed triggers. If the product is defective upon arrival, contact Rare Breed directly for warranty service. Check your local laws regarding forced-reset trigger systems prior to purchase. We reserve the right to refuse orders to jurisdictions where this product is prohibited by law.