About this product

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

Overview

Built specifically for the HK MR223 and HK MR556 platform, the FRT-MR3™ single-stage (3-position) forced reset trigger represents the next evolution in trigger system engineering from Rare Breed. This drop-in unit is designed to deliver a distinct shooting experience by combining a crisp single-stage pull with a mechanical forced-reset function that returns the trigger forward automatically after each shot. The FRT-MR3™ single-stage (3-position) forced reset trigger for the HK MR223 & HK MR556 features three selectable positions: safe, semi-automatic, and forced-reset mode. Each position is clearly marked and engages with a positive, audible click. The housing is machined from billet 7075-T6 aluminum and finished with a hard-coat anodized coating for durability under sustained use. All internal components are heat-treated steel with a nickel-Teflon coating for reduced friction and consistent performance.

Features & Specs

• Three-position selector: Safe – Semi – Forced Reset; no modification required to lower receiver
• Single-stage trigger pull weight: 4.5 lbs measured at the center of the shoe with a crisp, defined break
• Drop-in design: includes pre-assembled trigger group, hammer, disconnector, and selector; no gunsmith fitting necessary
• Material: 7075-T6 aluminum housing, heat-treated steel fire-control components, nickel-Teflon coated surfaces
• Compatible exclusively with HK MR223 and HK MR556 rifles; not interchangeable with AR-15 or other HK variants
• Manufacturer: Rare Breed | Category: Triggers

The FRT-MR3™ single-stage (3-position) forced reset trigger for the HK MR223 & HK MR556 is engineered to operate within the factory trigger pocket dimensions of these specific HK platforms. The hammer profile is optimized for HK bolt carriers, and the disconnector geometry is calibrated to the MR-series bolt travel. No trigger job, spring swaps, or aftermarket parts are required for installation or function.

• Nickel-Teflon coated sear surfaces reduce stacking and provide consistent pull cycle after cycle
• Hard-coat anodized housing resists wear from repeated selector manipulation and holster carry
• Positive detent engagement in all three positions prevents accidental selector movement under recoil

Who It’s For

This trigger is intended for HK MR223 and MR556 owners who want a single-stage trigger with a forced-reset capability that is built specifically for their rifle. It is suited for shooters who train with high round counts, participate in competitive shooting formats that permit forced-reset triggers, or simply want a trigger system that offers a distinct mechanical action without compromising the safety features of a three-position selector. The FRT-MR3™ single-stage (3-position) forced reset trigger for the HK MR223 & HK MR556 is not a conversion kit, not a binary trigger, and does not alter the firearm’s classification. It is a direct replacement trigger group that operates within the mechanical limits of the host firearm. Users should verify their local laws and range regulations before installing any forced-reset trigger system.

Shipping & FFL

This product ships directly to your residence or business. No Federal Firearms License transfer is required because this item is a firearm component, not a firearm frame or receiver. Standard shipping methods apply. International shipping is not available. Some states and municipalities have enacted restrictions on forced-reset triggers. It is the buyer’s sole responsibility to confirm that this product is legal to own, possess, and install in their jurisdiction before placing an order. By purchasing this item, you certify that you are in compliance with all applicable federal, state, and local laws. Rare Breed and this retailer assume no liability for misuse or non-compliance.