About this product

FRT-MR3™ (Flat) Single-Stage · 3-Position · Flat-Face · HK MR223 & MR556 HK MR223 HK MR556 The FRT-MR3™ (Flat) is the flat-faced evolution of the most advanced forced reset trigger available for the HK MR223 and HK MR556 . Engineered by Rare Breed Triggers , it combines three selectable positions — Safe, Semi-Auto, and Forced Reset — with a precision flat-face trigger bow t Ships to all 50 states. Available nationwide.

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

The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is a precision-engineered drop-in trigger system from Rare Breed. Designed specifically for the HK MR223 and HK MR556 platforms, this trigger delivers a forced-reset mechanism that returns the trigger forward immediately after each shot, enabling rapid follow-up shots while maintaining semi-automatic compliance. Each unit is machined from billet steel and aluminum for durability and consistent performance under repeated use.

Overview

The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 offers a three-position selector that provides safe, semi-automatic, and forced-reset firing modes. Unlike standard triggers, the forced-reset function physically pushes the trigger forward after the shot cycle, allowing the shooter to fire again by simply releasing and pressing the trigger. This FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is built to factory specifications for direct installation without modifications to the lower receiver. Rare Breed designed this trigger to meet ATF guidelines for forced-reset technology as of its release date, and it is intended for law-abiding firearm owners who train for speed and control.

Features & Specs

• Manufacturer: Rare Breed; Category: Triggers; Compatible with HK MR223 and HK MR556 only
• Three-position selector: Safe (position 1), Semi-automatic (position 2), Forced reset (position 3)
• Flat trigger shoe profile for consistent finger placement and reduced over-travel

• Single-stage design with a crisp 4.5 to 5.5-pound pull weight (factory set)
• Drop-in installation: no gunsmithing, filing, or permanent modifications required
• Constructed from heat-treated billet steel and 7075 aluminum with a corrosion-resistant finish

• Includes all necessary pins, springs, and detent hardware for complete installation
• Tested for 10,000+ cycles with no loss of reset performance
• Backed by Rare Breed’s limited lifetime warranty against manufacturing defects

The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 maintains a consistent trigger pull across all firing positions. The forced-reset mode requires the shooter to hold the trigger until the bolt cycles, then release to reset—this is not a full-auto device and must be used with proper technique. Each trigger is individually inspected before packaging.

Who It Is For

This trigger is intended for experienced shooters, competitive marksmen, and firearm enthusiasts who own an HK MR223 or MR556 and want to increase their rate of fire while staying within semi-automatic legal boundaries. It is suitable for range training, three-gun competition, and controlled rapid-fire drills. The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is not recommended for novice shooters or for use in hunting unless local regulations permit. It is designed for those who understand manual safety protocols and forced-reset operation. Law enforcement and military personnel may use this trigger in approved platforms, but civilian users should verify compatibility with their specific serial number range.

Shipping & FFL

This FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 ships directly to your address. No Federal Firearms License (FFL) transfer is required for this trigger because it is not a firearm frame or receiver. However, you must be at least 18 years old and legally eligible to own firearm components in your state of residence. Check your local and state laws before ordering, as some jurisdictions may restrict or prohibit forced-reset triggers. We ship via UPS Ground or FedEx with signature confirmation. Rare Breed triggers are in high demand; we fulfill orders on a first-come, first-served basis. All sales are final. By purchasing this product, you confirm that you are not prohibited from owning firearm parts under federal, state, or local law.