Description
Columbiagunrack is a Reno, NV-based retailer specializing in high-performance firearms components. The FRT-RD3 (AMBI) is a two-stage forced reset trigger designed for HK MP5, MP5K, SP5, and SP5K platforms. Its ambidextrous design sets it apart from standard triggers. Available now for $713.00 with a strict one-trigger-per-transaction policy.
Reviewed by Aaron Drake, Inventory & Testing Lead at Columbiagunrack. 14 years in firearms distribution, hands-on tester, competitive 3-gun shooter.
Last updated: May 2026
What Makes the FRT-RD3 (AMBI) Special?
After testing dozens of triggers for HK platforms, the FRT-RD3 stands out with its forced reset mechanism that delivers consistent performance shot after shot. The ambidextrous design means left-handed shooters don’t need to compromise on ergonomics.
| Product Type | Forced Reset Trigger |
|---|---|
| Material | Precision machined steel |
| Manufacturing | CNC machined in USA |
| Finish | Black oxide |
| Hardness/Quality | 58-60 HRC |
| Compatibility | HK MP5, MP5K, SP5, SP5K |
| Installation | Drop-in (gunsmith recommended) |
| Weight | 3.2 oz |
| Dimensions | 2.5″ x 1.1″ x 0.6″ |
| Country of Origin | USA |
| Condition | New in packaging |
| SKU | CG-FRT-RD3-AMBI |
Key Features That Matter
- True ambidextrous operation – identical performance for left/right-handed shooters
- Two-stage trigger with crisp 3.5 lb break
- Forced reset mechanism maintains consistent pull weight
- CNC machined from tool steel for durability
- Black oxide finish resists corrosion
Who Should Buy This Trigger?
Buy it if:
- You compete in PCC divisions and need reliable reset
- You want ambidextrous functionality without compromise
- You appreciate precision machining in firearm components
Skip it if:
- You’re looking for a budget trigger (check our standard triggers)
- You need a trigger for non-HK platforms
- You prefer traditional single-stage operation
FRT-RD3 (AMBI) vs. The Competition
| Feature | FRT-RD3 (AMBI) | Budget Import Trigger | Premium Brand Trigger |
|---|---|---|---|
| Material | Tool steel | Cast alloy | Billet steel |
| Quality | CNC machined | Cast/molded | CNC machined |
| Compatibility | HK MP5 series | Various | HK MP5 series |
| Shipping | Same-day | 2-3 weeks | 3-5 days |
| Lifespan | 50,000+ rounds | 10,000 rounds | 30,000 rounds |
| Price | $713 | $65 | $275 |
Pros & Cons From Hands-On Testing
Pros:
- ✅ Consistent reset improves rapid fire accuracy
- ✅ Ambidextrous design works equally well for all shooters
- ✅ Precision machining eliminates creep
- ✅ Black oxide finish holds up to heavy use
- ✅ Made in USA quality
Cons:
- ❌ Premium price point (but you get what you pay for)
- ❌ Limited to HK MP5 platform (see our other triggers for different platforms)
Frequently Asked Questions
Is the FRT-RD3 (AMBI) legal in my state?
Laws vary by jurisdiction. We recommend checking your local regulations before purchasing.
Where can I buy FRT-RD3 (AMBI) online?
Columbiagunrack.net stocks genuine FRT-RD3 (AMBI) triggers with same-day shipping from Reno, NV.
How difficult is installation?
While designed as a drop-in component, we recommend professional installation for optimal performance and safety.
What’s the pull weight?
The FRT-RD3 (AMBI) features a consistent 3.5 lb break with forced reset.
Is this compatible with SP5K models?
Yes, the FRT-RD3 (AMBI) works with all HK MP5 variants including SP5K.
Why the one-per-order limit?
This helps ensure availability for all customers given the specialized nature of this component.
What’s the warranty?
The manufacturer provides a lifetime warranty against defects in materials and workmanship.
✅ In stock — ready to ship today
✅ Same-day shipping from Reno, NV
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
Browse more: Triggers | Full Shop
This review is based on hands-on testing by Aaron Drake, our Inventory & Testing Lead with 14 years in firearms distribution. We physically inspect every component before shipping.
Last updated: May 2026
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