Michigan Gunshop is a Grand Rapids, MI-based retailer specializing in firearms and accessories. The FRT-RD3 (AMBI) is a two-stage (3-position) forced reset trigger designed for the HK MP5, MP5K, SP5 & SP5K. This trigger offers precise control and reliability. Available now for $713.00.
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 | Trigger |
|---|---|
| Material | High-Grade Steel |
| Manufacturing | CNC Machined |
| Finish | Black Oxide |
| Hardness/Quality | Rockwell C50 |
| Compatibility | HK MP5, MP5K, SP5, SP5K |
| Installation/Usage | Drop-In |
| Weight | 0.2 lbs |
| Dimensions | 2.5 x 1 x 0.5 inches |
| Country of Origin | USA |
| Condition | New |
| SKU | FRT-RD3-AMBI |
Key Features
- Two-stage (3-position) forced reset trigger
- Ambidextrous design for left or right-handed shooters
- Precision CNC machining for consistent performance
- Black oxide finish for durability and corrosion resistance
- Compatible with HK MP5, MP5K, SP5, and SP5K models
Who It’s For
The FRT-RD3 (AMBI) is ideal for:
- HK MP5, MP5K, SP5, and SP5K owners looking for enhanced trigger control
- Competitive shooters requiring precise trigger reset
- Firearms enthusiasts seeking reliable and durable components
Pros & Cons
- ✅ Precision CNC machining ensures consistent performance
- ✅ Ambidextrous design accommodates all shooters
- ✅ Black oxide finish enhances durability
- ✅ Compatible with multiple HK models
- ✅ Made in the USA for quality assurance
- ❌ Limited to one trigger per transaction
- ❌ Higher price point compared to standard triggers
Comparison
| Feature | FRT-RD3 (AMBI) | Cheap Import ($60-80) | Premium Brand ($250+) |
|---|---|---|---|
| Material | High-Grade Steel | Low-Grade Steel | High-Grade Steel |
| Quality | Rockwell C50 | Rockwell C30 | Rockwell C50 |
| Compatibility | HK MP5, MP5K, SP5, SP5K | Limited Compatibility | HK MP5, MP5K, SP5, SP5K |
| Shipping | Same-Day | 1-2 Weeks | 3-5 Days |
| Lifespan/Durability | High | Low | High |
| Price | $713.00 | $60-80 | $250+ |
FAQ
Where can I buy FRT-RD3 (AMBI) online?
You can purchase the FRT-RD3 (AMBI) at Michigan Gunshop (michigan-gunshop.com).
Is the FRT-RD3 (AMBI) compatible with other firearms?
The FRT-RD3 (AMBI) is specifically designed for HK MP5, MP5K, SP5, and SP5K models.
What is the installation process for the FRT-RD3 (AMBI)?
The FRT-RD3 (AMBI) is a drop-in trigger, making installation straightforward for most users.
What is the material of the FRT-RD3 (AMBI)?
The FRT-RD3 (AMBI) is made from high-grade steel with a black oxide finish.
Is the FRT-RD3 (AMBI) ambidextrous?
Yes, the FRT-RD3 (AMBI) features an ambidextrous design for left or right-handed shooters.
✅ Same-day shipping from Grand Rapids, MI
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
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