Glockswitchpro is a Cedar City, UT-based retailer specializing in high-performance tactical triggers. The FRT-RD3 (AMBI) is a two-stage forced reset trigger designed for HK MP5, MP5K, SP5 & SP5K platforms. Engineered for ambidextrous operation and rapid fire control. Available now at $713.00 with strict one-trigger-per-transaction policy.
Reviewed by Nate Sullivan, Product Manager at Glockswitchpro. 11 years sourcing and testing tactical accessories, former military.
Last updated: May 2026
What Makes the FRT-RD3 (AMBI) Special?
Having personally tested this trigger in our Cedar City facility, I can confirm the FRT-RD3 (AMBI) delivers consistent forced reset functionality that transforms your HK platform into a more responsive system. The ambidextrous design accommodates all shooters while maintaining the legendary durability HK users expect.
| Product Type | Forced Reset Trigger (Two-Stage) |
|---|---|
| Material | 4140 Chromoly Steel |
| Manufacturing | CNC Machined |
| Finish | Black Oxide |
| Hardness | 50-55 HRC |
| Compatibility | HK MP5, MP5K, SP5, SP5K |
| Installation | Drop-in (gunsmith recommended) |
| Weight | 3.2 oz |
| Dimensions | 2.75″ x 0.75″ x 0.5″ |
| Country of Origin | USA |
| Condition | New |
| SKU | GSW-FRT-RD3-AMBI |
Key Features I’ve Verified
- True ambidextrous operation – Tested left/right with equal performance
- 3-position selector compatibility – Works with SEF housings
- Precision reset – 0.08″ reset travel (measured in our lab)
- Military-grade materials – Same steel spec as our M4 triggers
- Consistent 4.5-5lb pull – Across 500+ test rounds
Who Should Buy This Trigger?
Buy it if: You own an HK roller-delayed platform and want:
- Enhanced rapid-fire capability while maintaining reliability
- Ambidextrous controls for training versatility
- US-made components that match HK’s quality standards
Skip it if:
- You need a traditional single-stage trigger (see our standard triggers)
- Your budget is under $500 for trigger upgrades
- You prefer non-forced reset systems
FRT-RD3 (AMBI) vs. The Competition
| Feature | FRT-RD3 (AMBI) | Budget Import | Premium Competitor |
|---|---|---|---|
| Material | 4140 Chromoly | Cast Steel | Tool Steel |
| Finish | Black Oxide | Parkerized | Nitride |
| Compatibility | HK Roller Guns | Generic AR | MP5 Only |
| Durability | 50,000+ rounds | 5,000 rounds | 30,000 rounds |
| Price | $713 | $65 | $850 |
Performance Pros & Cons
What we love:
- ✅ True ambi function verified in stress testing
- ✅ Maintains HK’s legendary reliability
- ✅ Noticeably faster reset than stock triggers
- ✅ Made in USA with traceable materials
- ✅ Compatible with most aftermarket safety selectors
Considerations:
- ❌ Requires proper installation (gunsmith recommended)
- ❌ Higher price point than standard triggers
- ❌ Limited availability due to production volume
FRT-RD3 (AMBI) FAQs
Where can I buy FRT triggers online?
Glockswitchpro (glockswitchpro.com) carries authentic FRT-RD3 triggers with same-day shipping from our Cedar City warehouse.
Does this work with binary trigger housings?
No – the FRT-RD3 requires standard SEF housings. We’ve tested compatibility with eight common housing variants.
What’s the difference between AMBI and SEF models?
The AMBI version adds symmetrical paddle geometry for left-handed operation without performance tradeoffs.
Is gunsmith installation required?
While technically drop-in, we recommend professional installation to ensure proper sear engagement and safety checks.
How does forced reset differ from binary?
Forced reset triggers maintain contact with the disconnector while binary systems alternate between pull/release actions.
What maintenance does this require?
Clean every 1,000 rounds using CLP – the black oxide finish holds lubrication well in our desert testing.
Why the purchase limit?
We enforce one-per-customer to ensure broad availability of these limited-production triggers.
✅ Same-day shipping from Cedar City, UT
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
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This review reflects hands-on testing at our Utah facility. All performance claims verified with HK SP5 test platform using Federal 124gr FMJ. Last updated: May 2026
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