Michigan Gunshop is a Grand Rapids, MI-based retailer specializing in firearms and accessories. The FRT-RD3 (SEF) is a two-stage forced reset trigger for HK MP5, MP5K, SP5 & SP5K platforms. Designed for precision and reliability. Available now for $707.25 with one trigger per transaction limit.
Reviewed by Michigan Gun Shop Staff, Federally Licensed Firearms Dealer at Michigan Gunshop. Type-1 FFL holders, Class 3 SOT, serving Michigan since 2014.
Last updated: May 2026
| Product Type | Forced Reset Trigger |
|---|---|
| Material | Steel |
| Manufacturing | CNC Machined |
| Finish | Black Oxide |
| Hardness/Quality | Mil-Spec |
| Compatibility | HK MP5, MP5K, SP5, SP5K |
| Installation/Usage | Drop-in |
| Weight | 3.2 oz |
| Dimensions | 2.5″ x 1.2″ x 0.8″ |
| Country of Origin | USA |
| Condition | New |
| SKU | FRT-RD3-SEF |
Key Features
- Two-stage trigger with forced reset mechanism
- 3-position selector compatibility (SEF)
- Precision CNC machining for consistent performance
- Mil-spec steel construction
- Drop-in installation
Pros & Cons
Pros:
- ✅ Improved trigger response
- ✅ Reliable forced reset mechanism
- ✅ Compatible with multiple HK platforms
- ✅ Made in USA
- ✅ Drop-in installation
Cons:
- ❌ Higher price point than basic triggers
- ❌ Limited to one per transaction
Who Should Buy
Buy it if:
- You own an HK MP5, MP5K, SP5 or SP5K
- You want improved trigger performance
- You prefer US-made components
Skip it if:
- You’re looking for budget triggers
- You need multiple triggers in one order
FAQ
Where can I buy FRT-RD3 (SEF) online?
Available at Michigan Gunshop (michigan-gunshop.com) with same-day shipping from Grand Rapids, MI.
What does SEF stand for?
SEF refers to the 3-position selector markings: Safe, Einzelfeuer (semi-auto), Feuerstoß (full-auto).
Is this trigger legal in Michigan?
Yes, this forced reset trigger is legal for civilian use in Michigan when properly installed in semi-automatic firearms.
What’s the difference between FRT-RD3 and standard triggers?
The FRT-RD3 features a forced reset mechanism that reduces trigger reset time compared to standard triggers.
Do you offer installation services?
We recommend professional installation. Contact us for local gunsmith referrals in the Grand Rapids area.
✅ Same-day shipping from Grand Rapids, MI
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
About this review: Our team has hands-on experience with this product in our Grand Rapids showroom. We verify all specifications with manufacturers.
Last updated: May 2026
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