FRT-RD3 (SEF)

About this product

Theglockswitchshop is a Flagstaff, AZ-based retailer specializing in firearms components and accessories. The FRT-RD3 (SEF) is a two-stage forced reset trigger designed specifically for HK MP5, MP5K, SP5, and SP5K platforms. Its precision engineering ensures reliable performance. Available now for $707.25, with only one trigger per transaction. Reviewed by Chad Mercer , Operations Lead at Theglockswitchshop. 13 years in firearms retail, FFL holder, precision machining background. Last updated: May 2026 Product Type Two-Stage Forced Reset Trigger Material High-Grade Steel Manufacturing Precision CNC Machining Finish Hardened Black Oxide Hardness/Quality 60 HRC Compatibility HK MP5, MP5K, SP5, SP5K Installation/Usage Drop-In Ready Weight 2.5 oz Dimensions 1.5" x 0.75" x 0.5" Country of Origin USA Condition New SKU FRT-RD3-SEF Key Features ✅ Two-stage operation for enhanced control ✅ Designed for HK MP5, MP5K, SP5, and SP5K ✅ Precision CNC machining for reliability ✅ Hardened black oxide finish for durability ✅ Drop-in installation with no gunsmithing required Who It's For Buy it if: You own an HK MP5, MP5K, SP5, or SP5K You want a reliable forced reset trigger You value precision engineering and durability Skip it if: You don’t own a compatible firearm You’re looking for a budget option You prefer a single-stage trigger Pros & Cons ✅ Pros: Precision CNC machining ensures reliability Hardened black oxide finish resists wear Drop-in installation saves time Compatible with multiple HK platforms Made in the USA ❌ Cons: Higher price point compared to budget options Limited to HK MP5, MP5K, SP5, and SP5K platforms Comparison Feature FRT-RD3 (SEF) Cheap Import Premium Brand Material High-Grade Steel Low-Grade Steel High-Grade Steel Quality Precision CNC Basic Machining Precision CNC Compatibility HK MP5 Series Generic HK MP5 Series Shipping Same-Day 1-2 Weeks 3-5 Days Lifespan Long-Term Short-Term Long-Term Price $707.25 $60-80 $250+ Watch: RB FRT RD3 & FRT15 L3 trigger time