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 represents a precision-engineered upgrade from Rare Breed, designed exclusively for the HK MR223 and MR556 platform. This drop-in trigger assembly replaces the factory trigger pack without permanent modification to the lower receiver. The FRT-MR3 operates on a forced reset mechanism that returns the trigger forward under spring tension after each shot, enabling a controlled cyclic rate limited only by the shooter’s trigger finger speed and the firearm’s bolt carrier group travel. The three-position selector provides safe, semi-automatic, and forced-reset modes, with the third position engaging the forced reset function. Each unit is machined from 4140 steel and 7075 aluminum components, with a single-stage break weight of approximately 4.5 to 5.5 pounds as measured from the factory.

Features & Specs

This FRT-MR3 single-stage (3-position) forced reset trigger for the HK MR223 & HK MR556 is built to interface directly with the HK MR223 and MR556 lower receivers, using the existing hammer and trigger pin holes without requiring additional adapters.

• Three-position selector: safe, semi-automatic, and forced reset mode with positive detent engagement at each position
• Single-stage trigger pull with consistent sear engagement and minimal overtravel in forced reset mode
• Drop-in assembly includes trigger, hammer, disconnector, sear, springs, and pins pre-installed in a housing unit

• Manufacturer: Rare Breed
• Category: Triggers
• Material: 4140 steel hammer and trigger, 7075 aluminum housing
• Compatibility: HK MR223 and HK MR556 only; not compatible with AR-15 or other 5.56 platforms

• Forced reset mechanism returns trigger to forward position automatically after each shot
• No modification required to the firearm receiver for installation
• Includes installation instructions and replacement selector lever specific to MR223/MR556 lowers

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 who own HK MR223 or MR556 rifles and seek an alternative trigger mechanism for range use and controlled rapid fire practice. This product is suitable for competitive shooters training in follow-up shot speed and recoil management, as well as collectors and enthusiasts of the HK 416-derived semi-automatic platform who want to explore the mechanical characteristics of a forced reset trigger system. The single-stage design and consistent pull weight make it appropriate for shooters familiar with trigger discipline and manual safety operation. This trigger is not designed for law enforcement or military duty use, nor for shooters who require a two-stage trigger for precision benchrest shooting.

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 does not require transfer through a Federal Firearms License (FFL) for shipment within the United States. However, certain states and local jurisdictions have enacted laws regulating the sale, possession, or use of forced reset triggers. It is the sole responsibility of the purchaser to verify that the FRT-MR3 is legal to own and operate in their state, county, and municipality before placing an order. This product cannot be shipped to addresses in jurisdictions that have explicitly prohibited forced reset triggers or binary trigger systems. By purchasing this item, the buyer confirms they are not prohibited from possessing firearms or firearm components under federal or state law. All shipments are sent via a carrier requiring an adult signature upon delivery. Returns are accepted within 14 days of delivery for unopened, unused items only, subject to a restocking fee. For questions regarding legal compliance, consult with a local attorney or your state attorney general’s office prior to purchase.