Rare Breed Triggers — FRT-15, FRT-22 & More
Rare Breed FRT-RD3™ (SEF) — Forced Reset Trigger for HK MP5/SP5
$707.25
● In stock · Ships from the USA
The Rare Breed FRT-RD3 SEF is the HK SEF-configuration variant of the FRT-RD3, designed for HK MP5, SP5, and PTR MP5 clone hosts equipped with an HK-style SEF selector housing. It delivers the same patented forced reset mechanism as all Rare Breed FRTs — bolt-stroke mechanical reset — in an MP5-native package.
USA-made, drop-in installation in standard SEF-configured MP5 trigger groups.
Fits
HK MP5 (SEF housing)HK SP5PTR MP5 Clone (SEF)
- Patented forced reset for MP5/SP5
- HK SEF-style selector configuration
- USA-made precision components
- Drop-in installation
- PTR MP5 clone compatible
SKU231582
Product details
The SEF variant uses HK's standard Safe/Semi/Full position selector housing layout (locked to semi by design). Compatible with PTR MP5 clones with SEF configuration. For ambidextrous selector, see FRT-RD3 AMBI.
Questions about the Rare Breed FRT-RD3™ (SEF) — Forced Reset Trigger for HK MP5/SP5
Will the FRT-RD3 SEF work in my PTR-9?
The FRT-RD3 SEF is compatible with PTR MP5 clones using a standard SEF trigger housing. Confirm your PTR's trigger group configuration matches HK SEF specs before ordering.
Is there a version for ambidextrous operation?
Yes — the FRT-RD3 AMBI includes an ambidextrous safety selector. If you need left-side controls, choose the AMBI version.
