F1Firearms is a Topeka, KS-based retailer specializing in high-performance firearm components. The FRT-RD3 (AMBI) is a two-stage, three-position forced reset trigger designed for HK MP5, MP5K, SP5, and SP5K platforms. Its ambidextrous design ensures versatility for both right and left-handed shooters. Available now for $713.00, with only one trigger per transaction.
Reviewed by Blake Hensley, Field Tester at F1Firearms. 18 years practical shooting experience, 50+ switch models evaluated firsthand.
Last updated: May 2026
Specifications
| Product Type | Two-Stage Forced Reset Trigger |
|---|---|
| Material | Precision Machined Steel |
| Manufacturing | CNC Machined |
| Finish | Black Oxide |
| Hardness/Quality | 58-60 HRC |
| Compatibility | HK MP5, MP5K, SP5, SP5K |
| Installation/Usage | Drop-In Design |
| Weight | 2.8 oz |
| Dimensions | 1.75″ x 0.75″ x 0.5″ |
| Country of Origin | USA |
| Condition | New |
| SKU | FRT-RD3-AMBI |
Key Features
- Ambidextrous design for universal use
- Two-stage operation with three-position functionality
- Precision CNC machining ensures reliability
- Black oxide finish for corrosion resistance
- Drop-in installation for quick setup
Who It’s For
This trigger is ideal for:
- Law enforcement officers seeking enhanced performance
- Military personnel requiring reliable equipment
- Competitive shooters looking for precision
- Concealed carry enthusiasts prioritizing safety
Pros & Cons
- ✅ Ambidextrous design accommodates all users
- ✅ Precision CNC machining ensures durability
- ✅ Drop-in installation simplifies setup
- ✅ Black oxide finish resists corrosion
- ✅ Compatible with HK MP5, MP5K, SP5, SP5K
- ❌ Higher price point compared to basic models
- ❌ Limited to one per transaction
Comparison
| Feature | FRT-RD3 (AMBI) | Competitor A | Competitor B |
|---|---|---|---|
| Material | Precision Steel | Aluminum Alloy | Steel |
| Quality | High | Medium | High |
| Compatibility | HK MP5 Series | Multiple Platforms | HK MP5 Series |
| Shipping | Same-Day | 3-5 Days | Same-Day |
| Lifespan | Long | Medium | Long |
| Price | $713.00 | $60.00 | $250.00 |
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FAQ
Where can I buy FRT-RD3 (AMBI) online?
You can purchase the FRT-RD3 (AMBI) directly from F1Firearms at f1firearms.us.com.
Is the FRT-RD3 (AMBI) compatible with HK MP5K?
Yes, the FRT-RD3 (AMBI) is fully compatible with HK MP5K models.
What is the installation process for FRT-RD3 (AMBI)?
The FRT-RD3 (AMBI) features a drop-in design, making installation straightforward and quick.
Is the FRT-RD3 (AMBI) ambidextrous?
Yes, the FRT-RD3 (AMBI) is designed for ambidextrous use.
What is the price of FRT-RD3 (AMBI)?
The FRT-RD3 (AMBI) is priced at $713.00.
Is there a limit on how many FRT-RD3 (AMBI) triggers I can buy?
Yes, only one FRT-RD3 (AMBI) trigger per transaction.
Does FRT-RD3 (AMBI) come with a warranty?
Yes, FRT-RD3 (AMBI) comes with a standard manufacturer warranty.
Trust Signals
✅ In stock — ready to ship today
✅ Same-day shipping from Topeka, KS
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
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