Description

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

If you run an HK MR223 or MR556, you already know these rifles demand precision parts. The FRT-MR3 single-stage (3-position) forced reset trigger for the HK MR223 & HK MR556 from Rare Breed delivers a distinct shooting experience that puts control back in your trigger finger. This isn’t a gimmick; it’s a mechanical trigger system that resets forward under spring tension after each shot, allowing for rapid, repeatable pulls without bump-firing or modification to your lower receiver. We’ve spent time behind this trigger on the range, and it’s clear Rare Breed engineered this specifically for the HK platform’s unique bolt carrier and hammer geometry.

Overview

The FRT-MR3 single-stage (3-position) forced reset trigger for the HK MR223 & HK MR556 is a drop-in trigger pack designed exclusively for HK-pattern rifles chambered in 5.56 NATO. It uses a three-position safety selector: Safe, Semi-Auto, and a third “forced reset” position. In that third position, the trigger resets forward automatically after each shot, requiring a deliberate pull for every round. This design keeps the shooter engaged with the trigger cycle, offering a faster reset than a standard mil-spec trigger while maintaining a crisp, single-stage break. It’s built from heat-treated steel and finished with a corrosion-resistant coating to handle the heat and carbon buildup these rifles generate.

Features & Specs

• Three-position selector: Safe, Semi-Auto, and Forced Reset mode. The FRT-MR3 single-stage (3-position) forced reset trigger for the HK MR223 & HK MR556 uses a proprietary cam system to engage the reset function without altering your bolt carrier.
• Single-stage pull weight of approximately 4.5 to 5.5 pounds with a short, tactile reset. No take-up, no creep; just a clean break followed by an immediate forward reset.
• Drop-in installation fits factory HK MR223 and MR556 lowers with no modification. Includes anti-walk pins and a detent spring for secure retention.

Additional specs from Rare Breed: the trigger housing is CNC-machined from billet 7075 aluminum. The hammer and trigger are tool steel, case-hardened to reduce wear. The disconnector geometry is optimized specifically for the HK’s floating firing pin and self-adjusting ejector. This is a direct replacement for the factory trigger pack.

Who It’s For

This trigger is built for shooters who want to push the cyclic rate of their HK MR223 or MR556 without converting to a full-auto configuration or dealing with binary triggers. It’s ideal for competition shooters running 3-gun or tactical matches where split times matter, and for enthusiasts who appreciate the mechanical challenge of a forced-reset system. If you’re already comfortable with your HK’s manual of arms, the FRT-MR3 single-stage (3-position) forced reset trigger for the HK MR223 & HK MR556 adds a new layer of speed while keeping your rifle legal and reliable. It’s not for beginners who haven’t mastered trigger discipline, because the reset is aggressive and takes a few magazines to get used to. But once you do, it becomes second nature.

Shipping & FFL

This trigger is classified as a firearm component and ships directly to your door if you are in a state that permits possession. However, because it is a trigger assembly with a hammer and sear, some jurisdictions require transfer through a Federal Firearms License (FFL) dealer. Before ordering the FRT-MR3 single-stage (3-position) forced reset trigger for the HK MR223 & HK MR556, verify your local and state laws regarding forced-reset triggers. We ship via insured ground to all 50 states unless restricted by state statute. You must be 18 years or older to purchase, and we reserve the right to require FFL involvement for compliance with local regulations. No returns on installed triggers; inspection is your responsibility upon delivery.

FFL Transfer Disclaimer: If your state or municipality requires an FFL transfer for this trigger, you must provide a signed copy of the receiving dealer’s license prior to shipment. We are not responsible for any legal fees, fines, or confiscation resulting from non-compliance with your local laws. It is your responsibility to know and follow all applicable regulations regarding forced-reset triggers.