Description

FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K

Overview

The FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is a precision-engineered drop-in trigger system from Rare Breed. Designed specifically for the HK roller-delayed platform, this trigger introduces a three-position selector and a forced reset mechanism that delivers a distinct two-stage feel. The FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K allows the shooter to move between safe, semi-automatic, and a forced reset mode that cycles the trigger forward after each shot. This unit is manufactured to strict tolerances using heat-treated steel and billet aluminum components, ensuring reliable function with standard MP5, MP5K, SP5, and SP5K lower receivers. The trigger is classified as a trigger assembly and does not contain any machine gun parts; it is a semi-automatic trigger with a mechanical reset feature that requires the shooter to maintain trigger control for each round fired.

Features & Specs

• Three-position selector: Safe (S), Semi (E), and Forced Reset (F) with positive detent engagement at each stop
• Two-stage trigger pull: first stage take-up with a crisp, defined second stage break; forced reset mode automatically resets the trigger forward after each shot, requiring the shooter to release and re-press for subsequent rounds
• Drop-in design: fits standard SEF (Navy) trigger housings; no permanent modification required to the host firearm

• Manufacturer: Rare Breed | Category: Triggers
• Compatible with HK MP5, MP5K, SP5, and SP5K models using SEF-pack style lower receivers
• Constructed from 4140 steel hammer and sear components, hard coat anodized aluminum housing
• Each unit is individually test-fired at the factory to verify function and pull weight consistency

• Includes: complete trigger pack assembly, selector lever, detent springs, and installation pins
• No additional parts or gunsmith fitting required for standard SEF lowers; some aftermarket housings may require minor fitting
• Patented forced reset geometry maintains ATF classification as a semi-automatic trigger when used as intended

Who It’s For

The FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is intended for experienced shooters who own a registered semi-automatic MP5-pattern firearm and seek a trigger system that offers a distinct mechanical shooting experience. This trigger is not a full-auto device and is designed for use in legal semi-automatic configurations only. It is appropriate for competitive shooters, collectors, and enthusiasts who understand forced reset mechanics and the manual of arms required to operate them safely. The three-position selector provides the convenience of a traditional safe and semi-automatic setting for standard range use, with the forced reset position available for those who want a faster cadence with deliberate trigger manipulation. Users must be familiar with their local and federal laws regarding trigger systems, as some jurisdictions restrict the ownership or use of forced reset triggers. This product is not recommended for novice shooters or those who cannot safely manage the forced reset function.

Shipping & FFL

This FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K ships directly to your door. No FFL transfer is required for this trigger assembly as it is not a firearm or firearm frame. All orders are processed within one business day and shipped via insured ground services. You must be 18 years or older to purchase. Check your state and local laws before ordering; some states and municipalities have restrictions on forced reset triggers. By purchasing, you certify that the item is legal to own in your jurisdiction and that you will not use it in any configuration that violates federal law. Rare Breed triggers are warrantied against manufacturing defects for one year from the date of purchase. Installation instructions and safety information are included with every unit.