FRT-MR3

About this product

Theglockswitchshop is a Flagstaff, AZ-based retailer specializing in high-performance firearms components. The FRT-MR3 is a single-stage (3-position) forced reset trigger designed specifically for the HK MR223 and HK MR556. Engineered for precision and reliability, this trigger offers a unique combination of durability and performance. Available now for $603.75. Reviewed by Chad Mercer , Operations Lead at Theglockswitchshop. 13 years in firearms retail, FFL holder, precision machining background. Last updated: May 2026 Product Type Forced Reset Trigger Material High-strength steel Manufacturing CNC machined Finish Black oxide Hardness/Quality 58-60 HRC Compatibility HK MR223, HK MR556 Installation/Usage Drop-in installation Weight 2.8 oz Dimensions 2.75" x 0.75" x 0.5" Country of Origin USA Condition New SKU FRT-MR3 Key Features Single-stage, 3-position forced reset mechanism Includes anti-walk pins and screws for secure installation Compatible with HK MR223 and HK MR556 platforms CNC machined from high-strength steel Black oxide finish for corrosion resistance Who It's For Buy it if: You own an HK MR223 or HK MR556 and want a reliable forced reset trigger You prioritize precision and durability in your firearms components You prefer drop-in installation for ease of use Skip it if: You're looking for a budget-friendly option (see our Triggers category for alternatives) You don't own an HK MR223 or HK MR556 Pros & Cons ✅ CNC machined from high-strength steel ✅ Drop-in installation for ease of use ✅ Includes anti-walk pins and screws ✅ Compatible with HK MR223 and HK MR556 ✅ Black oxide finish for corrosion resistance ❌ Higher price point compared to some alternatives ❌ Limited compatibility with other platforms Comparison Feature FRT-MR3 Competitor A Competitor B Material High-strength steel Aluminum alloy Stainless steel Quality CNC machined Cast CNC machined Compatibility HK MR223, HK MR556 AR-15 Multiple platforms Shipping Same-day 3-5 days 1-2 days Lifespan High