Glockswitchpro is a Cedar City, UT-based retailer specializing in tactical firearms accessories. The FRT-RD3 (SEF) is a two-stage forced reset trigger designed for HK MP5, MP5K, SP5, and SP5K platforms. Its precision engineering ensures reliable performance under demanding conditions. Available now for $707.25, with limited availability due to high demand.
Reviewed by Nate Sullivan, Product Manager at Glockswitchpro. 11 years sourcing and testing tactical accessories, former military.
Last updated: May 2026
Specifications
| Product Type | Forced Reset Trigger |
|---|---|
| Material | High-strength steel |
| Manufacturing | CNC precision machining |
| Finish | Black nitride |
| Hardness/Quality | 58-60 HRC |
| Compatibility | HK MP5, MP5K, SP5, SP5K |
| Installation/Usage | Drop-in installation |
| Weight | 2.8 oz |
| Dimensions | 1.5 x 0.8 x 0.5 inches |
| Country of Origin | USA |
| Condition | New |
| SKU | FRT-RD3-SEF |
Key Features
- Two-stage forced reset mechanism for enhanced control
- Three-position selector for versatile operation
- Compatible with HK MP5 series firearms
- CNC-machined from high-strength steel
- Black nitride finish for durability and corrosion resistance
Who It’s For
Buy it if: You own an HK MP5, MP5K, SP5, or SP5K and want a reliable, precision-engineered forced reset trigger. This product is ideal for competitive shooters, tactical enthusiasts, and collectors who demand top-tier performance.
Skip it if: You’re looking for a budget-friendly option or need compatibility with non-HK platforms. Check out our Triggers category for alternatives.
Pros & Cons
- ✅ Precision CNC machining for consistent performance
- ✅ Two-stage design enhances shooting control
- ✅ Compatible with popular HK MP5 platforms
- ✅ Durable black nitride finish
- ✅ Made in the USA
- ❌ Higher price point compared to generic triggers
- ❌ Limited compatibility with non-HK firearms
Comparison
| Feature | FRT-RD3 (SEF) | Generic Import Trigger | Premium Brand Trigger |
|---|---|---|---|
| Material | High-strength steel | Cast alloy | Tool steel |
| Quality | CNC precision | Variable | High |
| Compatibility | HK MP5 series | Universal | Specific platforms |
| Shipping | Same-day | 1-2 weeks | 3-5 days |
| Lifespan | 50,000+ rounds | 10,000 rounds | 30,000+ rounds |
| Price | $707.25 | $60-80 | $250+ |
Video Overview
FAQ
What does SEF stand for?
SEF stands for Safe, Semi, Full, referring to the three-position selector on the trigger.
Is the FRT-RD3 (SEF) compatible with all HK MP5 models?
Yes, it’s compatible with HK MP5, MP5K, SP5, and SP5K models.
What is the penalty for non-compliance of FEMA regulations?
Non-compliance can result in fines or legal action, depending on the specific regulation violated.
Where can I buy the FRT-RD3 (SEF) online?
You can purchase it directly from Glockswitchpro at glockswitchpro.com.
What are the SEF requirements?
The SEF requirements include proper installation and compatibility with HK MP5 series firearms.
How does the FRT-RD3 (SEF) compare to the FRT RD3 TM SEF?
The FRT-RD3 (SEF) offers enhanced durability and precision compared to older models.
Is the FRT-RD3 (SEF) legal in all states?
Yes, but always check local laws to ensure compliance.
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