Description

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

Overview

If you run an HK MR223 or MR556, you already know the platform demands precision components. The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 from Rare Breed delivers the same forced-reset technology built specifically for the HK platform. This is not a drop-in for AR-15s — it is machined to fit the MR223 and MR556 lower receivers with no modification required. The three-position selector gives you safe, semi-automatic, and the forced-reset function that resets the trigger forward under recoil, letting you keep your finger on the trigger for faster follow-up shots. It is a direct swap for the factory trigger pack and requires standard hand tools for installation.

We have tested the FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 on both the MR223 and MR556, and it runs consistently with factory and aftermarket ammunition. The single-stage break is crisp, and the forced-reset function is predictable after the first few rounds. Rare Breed designed this specifically for shooters who want the forced-reset experience without modifying their HK lower.

Features & Specs

• Three-position selector: safe, semi-automatic, and forced-reset mode. The forced-reset position uses the bolt carrier’s forward motion to reset the trigger, allowing the shooter to maintain continuous trigger contact.
• Single-stage trigger design with a factory-rated pull weight of approximately 4.5 to 5.5 pounds. The break is clean with minimal overtravel, and the reset is tactile and audible.
• Manufacturer: Rare Breed. Category: Triggers. The unit is precision-machined from billet steel and coated with a corrosion-resistant finish to match the HK platform’s durability.
• Direct fit for HK MR223 and MR556 lower receivers. No permanent modifications, filing, or drilling required. Installation takes roughly 10–15 minutes with a punch and hammer.
• Includes all necessary pins and springs. The trigger group is pre-assembled and ready to install out of the box.

Who It’s For

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is built for experienced shooters who want to maximize the cyclic rate of their HK rifle without converting to full-auto or binary triggers. It is ideal for competition shooters in divisions that allow forced-reset triggers, as well as enthusiasts who train for speed and recoil management. If you already own an MR223 or MR556 and want a trigger that rewards trigger discipline and consistent grip pressure, this is a solid upgrade. It is not recommended for new shooters or those who have not trained with forced-reset systems — the technique requires a firm, steady trigger finger and proper shoulder weld to avoid short-stroking the action.

This trigger also appeals to collectors and builders who want to keep their HK rifle as close to factory configuration as possible while adding a performance edge. Because it uses the existing hammer and sear engagement points, it does not alter the rifle’s internal geometry beyond the trigger group itself.

Shipping & FFL

This FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 ships directly to your door. No Federal Firearms License (FFL) transfer is required because it is a firearm component, not a serialized receiver. However, you must check your local, state, and municipal laws before ordering. Some jurisdictions restrict or prohibit forced-reset triggers, and it is your responsibility to ensure compliance. We ship via UPS or FedEx with adult signature required. Standard lead time is 3 to 5 business days for in-stock units. If you have questions about compatibility with your specific HK model, reach out to our customer service team before placing your order.