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

Overview

If you own an HK MR223 or MR556, you already know the platform delivers exceptional accuracy and reliability. The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 bridges the gap between precision and rapid follow-up shots, giving you a trigger that rewards controlled manipulation. This isn’t a gimmick; it is a purpose-built component from Rare Breed that changes how you interact with your rifle. By combining a familiar single-stage break with a forced-reset sear engagement, the FRT-MR3™ allows you to stay on target without lifting your finger. Whether you are drilling transition drills or ringing steel at distance, this trigger keeps you in the fight.

Features & Specs

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is machined to HK-spec dimensions and drops directly into your lower receiver. It gives you three distinct positions: safe, semi-automatic, and the forced-reset mode. In forced-reset mode, the trigger resets forward automatically as the bolt cycles, so you can fire again by simply releasing pressure and pressing again. This allows for faster splits while maintaining positive control over each shot.

• Three-position selector: safe, semi-automatic, and forced-reset mode with a crisp single-stage break
• Manufactured by Rare Breed using heat-treated steel components and precision-machined sear surfaces
• Drop-in design for HK MR223 and HK MR556 lowers; includes all necessary springs and pins

• Single-stage trigger pull weight of approximately 4.5 to 5.5 pounds, tested for consistent reset
• Forced-reset mechanism returns the trigger forward without shooter input, enabling rapid, controlled follow-up shots
• Compatible with standard HK hammer and trigger pins; no permanent modification required

• Heat-treated tool steel construction for durability under heavy use
• Designed and assembled in the United States by Rare Breed
• Includes detailed installation guide and warranty information

Who It’s For

The FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is built for shooters who spend serious time behind their HK platform. If you run drills that demand fast, accurate follow-up shots—think bill drills, failure drills, or competitive stages—the forced-reset mode lets you stay on the trigger without breaking your grip or losing sight picture. It is also a solid choice for collectors and enthusiasts who want to experience the unique mechanical feel of a forced-reset trigger without modifying their original HK parts. If you are a gunsmith or advanced DIY builder, you will appreciate the straightforward drop-in installation and the ability to switch back to a standard trigger at any time. This trigger is not for beginners looking for a shortcut; it is for shooters who understand the mechanics behind each pull and want a tool that rewards deliberate technique.

Shipping & FFL

This FRT-MR3™ Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 ships directly to your doorstep. No FFL transfer is required because this item is classified as a firearm component, not a complete firearm or receiver. However, you must be at least 18 years old to purchase trigger components, and we reserve the right to verify your age and compliance with all applicable federal, state, and local laws. It is your responsibility to ensure possession of this trigger is legal in your jurisdiction before placing an order. We ship via insured ground service to all 50 states except where prohibited by local ordinance. If you have questions about your state’s regulations, give us a call or check with your local firearms authority before completing your purchase.