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 assembly designed exclusively for HK-pattern rifles. Manufactured by Rare Breed, this trigger delivers a single-stage, forced-reset operating system that allows the shooter to achieve rapid follow-up shots through a three-position selector. The FRT-MR3™ is built to the same tolerances as the existing Rare Breed forced reset trigger family, but with geometry optimized for the MR223 and MR556 platforms. This is a direct replacement unit that requires no permanent modification to the host firearm.

Features & Specs

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 offers a distinct mechanical advantage over standard single-stage triggers. By utilizing a forced reset mechanism, the trigger resets forward under spring tension immediately after each shot, enabling a controlled cyclic rate without modifying the rifle’s internal bolt carrier group. The three-position selector provides safe, semi-automatic, and forced-reset modes. Below are the core specifications and included features:

• Manufacturer: Rare Breed | Category: Triggers | Platform: HK MR223, HK MR556
• Single-stage trigger with forced reset technology; three-position selector (Safe, Semi, FRT)
• Drop-in design; no permanent alterations to the receiver required for installation
• All steel internal components, precision CNC machined, with a corrosion-resistant finish
• Includes trigger, hammer, disconnector, selector, springs, and roll pins — complete assembly

Who It’s For

This trigger is intended for shooters who own an HK MR223 or HK MR556 and demand a reliable, repeatable forced-reset system that can be installed without a gunsmith. The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is suited for competitive shooters, firearms enthusiasts, and those who train with high-volume firing schedules. It is not a binary trigger and does not enable automatic fire; it functions exclusively through a manual reset caused by the shooter’s trigger finger. Users should have a basic understanding of trigger installation and be familiar with safe firearm handling procedures. This product is not recommended for novice builders or those unfamiliar with forced reset trigger operation.

• Designed for HK MR223 and HK MR556 owners seeking a drop-in forced reset trigger
• Ideal for shooters who train with fast, controlled split times and prefer single-stage feel
• Suitable for authorized end users in states where forced reset triggers are legal (check local laws)

Shipping & FFL

This product ships directly to your doorstep. No Federal Firearms License (FFL) transfer is required because the FRT-MR3™ is a firearm component, not a serialized receiver. However, you must verify that forced reset triggers are legal in your state, county, and municipality before ordering. Rare Breed and the retailer are not responsible for compliance with local laws. By purchasing the FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556, you certify that you are not prohibited from possessing firearm parts and that you will install and use the trigger in compliance with all applicable federal, state, and local regulations. Standard shipping rates apply; expedited options are available at checkout.

• No FFL transfer required — ships directly to your shipping address
• Must be 18 years or older to purchase; signature may be required upon delivery
• Buyer assumes all responsibility for compliance with local, state, and federal laws regarding forced reset triggers