Rare Breed Triggers FRT-RD3™ (AMBI) — Forced Reset Trigger for HK MP5 / MP5K / SP5 / SP5K
$620.00
The world’s only Forced Reset Trigger for HK MP5, MP5K, SP5 and SP5K. 3-position ambidextrous selector included, drop-in installation, 100% USA made by Rare Breed Triggers. $620 — their highest-spec trigger.
The Rare Breed Triggers FRT-RD3™ (AMBI) is the world’s only Forced Reset Trigger built specifically for HK MP5, MP5K, SP5 and SP5K roller-delayed firearms. At $620 it’s Rare Breed’s flagship — engineered from scratch for HK’s legendary roller-delayed action, with full ambidextrous safety selector support and everything needed for a complete installation.
Why the FRT-RD3 is the Top of the Rare Breed Lineup
The MP5 and SP5 have a cult following for good reason — they’re among the most reliable and accurate pistol-caliber platforms ever made. The FRT-RD3 takes that platform and adds the mechanical advantage of forced reset technology: dramatically faster follow-up shots while maintaining one-round-per-pull semi-auto operation. No NFA. No machine gun classification. Just faster shooting.
What’s in the Box
- 1x FRT-RD3™ (AMBI) Trigger Assembly
- 3-position ambidextrous safety selectors for HK AMBI pattern
- All necessary hardware for installation
- Installation instructions
Specifications
| Compatibility | HK MP5, MP5K, SP5, SP5K (roller-delayed pattern) |
| Fire Modes | Safe / Semi / FRT (3-position) |
| Safety Selector | 3-position ambidextrous — HK AMBI pattern |
| Installation | Drop-in, no permanent modification |
| Construction | 100% USA manufactured and assembled |
| Finish | Duty-grade black nitride |
| Limit | One trigger per transaction |
Pros & Cons
- ✅ Only FRT available for HK MP5/SP5 platform
- ✅ Full AMBI selector — works for left and right-handed shooters
- ✅ Drop-in — no gunsmith, no permanent mods
- ✅ 100% USA made by the original FRT inventors
- ✅ No NFA — semi-auto, one round per pull
- ⚠️ MP5/SP5 platform only — not for AR-15
- ⚠️ Not available to CA, CT, DE, HI, IL, MA, MD, NJ, NY, OR, RI, WA, DC
FAQ
Does it fit the civilian SP5?
Yes — the FRT-RD3 AMBI is compatible with the civilian HK SP5 and SP5K, as well as the MP5 and MP5K.
Is it a machine gun?
No. The FRT-RD3 fires one round per trigger pull. It is semi-automatic by both legal and mechanical definition.
AMBI vs SEF?
The AMBI version ($620) includes ambidextrous safety selectors for HK AMBI-pattern firearms. The SEF version ($615) includes traditional SEF-pattern selectors. Choose based on your firearm’s selector pattern.
Buy Firearms Online – Reliable & Affordable
This Rare Breed Triggers FRT-RD3™ (AMBI) — Forced Reset Trigger for HK MP5 / MP5K / SP5 / SP5K is ideal for shooters looking to buy guns online with confidence. Built with precision engineering and tested performance, it’s a top-tier choice whether you're looking for home defense, sport shooting, or a trusted everyday carry.
Why Choose the Rare Breed Triggers FRT-RD3™ (AMBI) — Forced Reset Trigger for HK MP5 / MP5K / SP5 / SP5K?
- ✅ Quality guaranteed by top firearm manufacturers
- ✅ Ships fast across the USA
- ✅ Legal compliance and background-check ready
Buy Firearms Near Me – Nationwide Delivery
No matter your location, we ship to all 50 states. Looking for where to buy Frt-15 near you? FRT-15.com brings the best selection to your door, legally and securely.
Shipping & Return Policy
- 📦 Fast shipping within 1–3 business days
- 🔁 30-day return policy for unused, unmodified items
- 💬 Questions? Contact our support team
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