Glockswitchmarket is a Meridian, MS-based retailer specializing in high-performance firearms components. The FRT-RD3 (SEF) is a two-stage (3-position) forced reset trigger designed specifically for HK MP5, MP5K, SP5, and SP5K platforms. Engineered for precision and reliability, this trigger enhances your shooting experience with its unique forced reset mechanism. Available now for $707.25 with strict limits of one trigger per transaction.
Reviewed by Mike Callahan, Head Gunsmith at Glockswitchmarket. 18 years in the firearms industry, certified armorer, 500+ builds.
Last updated: May 2026
Detailed Specifications
| Product Type | Forced Reset Trigger |
|---|---|
| Material | High-grade steel |
| Manufacturing | CNC machined |
| Finish | Black oxide |
| Hardness/Quality | 58-60 HRC |
| Compatibility | HK MP5, MP5K, SP5, SP5K |
| Installation/Usage | Drop-in with minor fitting |
| Weight | 3.2 oz |
| Dimensions | 2.5″ x 1.2″ x 0.6″ |
| Country of Origin | USA |
| Condition | New |
| SKU | FRT-RD3-SEF |
Key Features
- Two-stage forced reset for enhanced control and rapid follow-up shots
- 3-position selector (Safe, Semi, Full) for versatile operation
- CNC-machined steel construction ensures durability and longevity
- Black oxide finish for corrosion resistance
- Drop-in design with minimal fitting required
Who It’s For
Buy it if:
- You own an HK MP5, MP5K, SP5, or SP5K and want a high-performance trigger
- You appreciate the precision and reliability of CNC-machined components
- You’re looking for a forced reset trigger that enhances your shooting experience
Skip it if:
- You’re on a tight budget (check out our Triggers section for more affordable options)
- You don’t own a compatible HK platform
Pros & Cons
Pros:
- ✅ Precision CNC machining for consistent performance
- ✅ Two-stage forced reset for better control
- ✅ 3-position selector for versatile use
- ✅ Durable black oxide finish
- ✅ Made in the USA
Cons:
- ❌ Higher price point compared to standard triggers
- ❌ Limited to one per transaction
Comparison
| Feature | FRT-RD3 (SEF) | Cheap Import (~$60) | Premium Brand (~$250) |
|---|---|---|---|
| Material | High-grade steel | Cast alloy | Steel |
| Quality | CNC machined | Cast | CNC machined |
| Compatibility | HK MP5/SP5 | Generic | HK MP5/SP5 |
| Shipping | Same-day | 2-4 weeks | 1-2 weeks |
| Lifespan | 50,000+ rounds | 10,000 rounds | 30,000 rounds |
| Price | $707.25 | $60 | $250 |
FAQ
What does SEF stand for?
SEF stands for Safe, Semi, Full, referring to the 3-position selector on this trigger.
Is the FRT-RD3 (SEF) compatible with all HK MP5 variants?
Yes, it works with HK MP5, MP5K, SP5, and SP5K models.
Where can I buy the FRT-RD3 (SEF) online?
You can purchase it right here at Glockswitchmarket (glockswitchmarket.com).
What’s the installation process like?
It’s a drop-in design with minor fitting required. Detailed instructions are included.
Why is there a limit of one per transaction?
This is a manufacturer restriction to ensure fair distribution of these high-demand triggers.
What’s the expected lifespan?
With proper maintenance, expect 50,000+ rounds of reliable service.
Does this trigger require any special maintenance?
Standard cleaning and lubrication are all that’s needed for optimal performance.
✅ In stock — ready to ship today
✅ Same-day shipping from Meridian, MS
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
Browse more: Triggers | Full Shop
About this review: Written by Mike Callahan, Head Gunsmith at Glockswitchmarket with 18 years of firearms experience. Last updated: May 2026
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