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 from Rare Breed. Designed specifically for the HK MR223 and HK MR556 platforms, this trigger replaces the factory fire control group with a patented forced-reset mechanism. The three-position selector allows the operator to choose between SAFE, SEMI-AUTOMATIC, and the forced-reset function, which resets the trigger forward after each shot without requiring a full manual release. This trigger is machined from billet steel and heat-treated for durability in both range and training environments.

Features & Specs

• Three-position selector: SAFE, SEMI, and forced-reset mode for controlled, rapid follow-up shots
• Single-stage design with a consistent 4.5 to 5.5 lb trigger pull weight
• Drop-in installation — no gunsmithing or permanent modification required; uses factory hammer and disconnector pins
• Manufacturer: Rare Breed | Category: Triggers | Platform: HK MR223, HK MR556
• Machined from 4140 billet steel with a QPQ corrosion-resistant finish

Who It's For

This FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is intended for experienced shooters who demand reliable, repeatable trigger performance in a duty-grade rifle. It suits competitive shooters in 3-gun or similar disciplines who need fast reset without sacrificing safety, as well as trainers and enthusiasts who run high-round-count courses. The forced-reset function requires deliberate trigger discipline and is not recommended for novice shooters unfamiliar with reset-based trigger systems. The drop-in design makes it accessible to any MR223 or MR556 owner comfortable with basic armorer-level installation. This trigger is also compatible with select aftermarket lowers that accept standard HK-pattern fire control groups, but users should verify fitment with their specific lower receiver.

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 residence. No FFL transfer is required for this item. However, you must verify that local, state, and federal laws permit the ownership and installation of forced-reset trigger systems in your jurisdiction. Some states and municipalities restrict or prohibit forced-reset triggers; it is your responsibility to ensure compliance with all applicable laws before ordering. Rare Breed triggers are not registered as firearms, but certain states treat them as regulated parts. If you are uncertain about legality in your area, consult a qualified attorney or your local law enforcement agency. We reserve the right to cancel orders to jurisdictions where these components are prohibited.