FRT MR3™ Forced Reset Trigger for the HK MR223 & HK MR556

The FRT MR3™ Forced Reset Trigger for the HK MR223 and HK MR556 delivers a faster reset mechanism, allowing for quicker follow-up shots while maintaining full compliance with federal regulations. Designed specifically for these platforms, it combines precision engineering with reliable performance.

What you get

• Drop-in, duty-grade 3-position trigger (Safe/Semi/FRT)
• 3-position ambidextrous safety selector
• Anti-walk pins for secure installation
• Manufactured and assembled in the USA
• Compatible with HK MR223 and HK MR556 platforms

Build and finish

The FRT MR3™ is built to exacting standards, using premium materials and tight tolerances to ensure consistent performance under demanding conditions. Its components are precision-machined to fit seamlessly into your HK MR223 or HK MR556, minimizing the need for adjustments during installation.

The trigger features a smooth, durable finish that resists wear and corrosion, even during extended range sessions or tactical training. The ambidextrous safety selector is designed for ease of use, allowing both right- and left-handed shooters to operate it effortlessly. Anti-walk pins ensure the trigger remains securely in place, eliminating the risk of movement during use.

Compatible platforms

• HK MR223
• HK MR556

Installation notes

The FRT MR3™ is designed as a drop-in unit, making installation straightforward for those familiar with basic firearm maintenance. The included anti-walk pins and ambidextrous safety selector ensure a secure fit without additional modifications. Tools required for installation include a standard punch set and armorer’s wrench.

For shooters looking to enhance the performance of their HK MR223 or HK MR556, the FRT MR3™ offers a reliable and compliant solution. Its precision engineering and durable construction make it a practical upgrade for competitive shooting, tactical training, or general range use. Pair it with other high-quality accessories from F1 Firearms to maximize your platform’s potential.