
FRT-RD3™ (SEF) Two-Stage · 3-Position · SEF Housing · HK MP5 / MP5K / SP5 / SP5K HK MP5 HK MP5K HK SP5 HK SP5K The FRT-RD3™ (SEF) delivers Rare Breed Triggers’ patented forced reset technology inside the iconic SEF (Safe/Semi/Full) housing — purpose-built for the HK MP5, MP5K, SP5, and SP5K . Three selectable positions — Safe, Two-Stage, and Forced Reset — in a classic
FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 and SP5K Rare Breed continues to push the boundaries of trigger engineering with the FRT-RD3, now available in the Single-Edge Fire (SEF) configuration for the HK roller-delayed platform. This is a two-stage, three-position forced reset trigger specifically designed for the HK MP5, MP5K, SP5, and SP5K. It offers a mechanical cycling rate that is entirely dependent on the shooter’s trigger finger, providing a positive reset feel that is distinct from traditional binary or standard semi-automatic triggers. The FRT-RD3 (SEF) operates on a true forced reset principle, where the trigger must fully reset forward after each shot before it can be pulled again, creating a rapid-fire capability that is both controlled and repeatable. Overview The FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 and SP5K is engineered for shooters who demand maximum performance from their roller-delayed firearm. This trigger replaces the factory trigger pack with a drop-in unit that requires no permanent modifications to the host weapon. The three-position selector allows the shooter to choose between Safe, Semi-Automatic, and the Forced Reset mode. In the forced reset position, the trigger mechanically forces the sear to disengage after each cycle, requiring the shooter to release the tr