AR-15 Lab FRT-MR3 (FLAT)

The Rare Breed Triggers FRT-MR3™ is a single-stage forced reset trigger engineered for real cycle rate performance on HK MR223 and HK MR556 platforms. This drop-in trigger features a 3-position selector (Safe/Semi/FRT®) with ambidextrous safety and includes anti-walk pins for secure installation. Machined and assembled in the USA from hardened steel components.

Designed for rapid follow-up shots while maintaining reliability, the FRT-MR3™ delivers consistent forced reset function without compromising durability. Includes A1/A4 selector drums, roll pins, and T10 hardware for direct compatibility with HK MR-series rifles. Rare Breed Triggers builds proven performance into every component.

Upgrade your HK platform with this duty-grade trigger system.