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

If you run an HK MP5, MP5K, SP5, or SP5K, you already know the platform rewards precision and control. The FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger from Rare Breed is designed to give you a distinct mechanical advantage without compromising safety or build quality. This is a drop-in trigger pack engineered specifically for SEF-style housings, and it brings a responsive two-stage pull with a forced-reset function that resets the trigger forward as you ride the bolt. It is a purpose-driven upgrade for shooters who want faster follow-up shots while staying within a legal, semi-automatic fire pattern.

Overview

The FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is Rare Breed’s latest addition to the forced-reset trigger family. Unlike standard triggers, the forced-reset mechanism actively pushes the trigger shoe forward after each shot, allowing you to maintain consistent finger placement and reset without needing to fully release the trigger. The three-position selector offers safe, semi-automatic, and a third position dedicated to the forced-reset function. It is built for the SEF trigger housing found on many MP5 variants, and installation requires no permanent modification to your firearm.

This FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is a direct fit for HK-pattern firearms using the standard SEF pack geometry. The two-stage pull gives you a clean take-up before the wall, then a crisp break. The forced-reset cycle is consistent and predictable, which is exactly what you want when working the trigger under time or movement.

Features & Specs

• Two-stage trigger pull with a distinct first-stage take-up and a crisp second-stage break; the forced-reset function returns the shoe forward automatically after each discharge
• Three-position selector (Safe, Semi-Automatic, Forced Reset) compatible with SEF trigger housings used on HK MP5, MP5K, SP5, and SP5K models
• Manufactured by Rare Breed, a trusted name in precision trigger systems; includes all necessary internal components for a straightforward drop-in installation into your existing SEF pack

Each FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is machined from hardened steel components and tested for proper engagement and reset timing. The trigger shoe features a flat profile with serrations for positive finger placement, even in wet or gloved conditions. The entire assembly is designed to function reliably with standard MP5 bolt carriers and hammer configurations.

Who It’s For

This trigger is built for HK MP5, MP5K, SP5, and SP5K owners who want a refined shooting experience with a mechanical advantage in reset speed. It suits competitive shooters, defensive practitioners, and enthusiasts who appreciate the engineering behind a forced-reset system. If you already run an SEF trigger housing and want a two-stage pull with the added capability of a forced-reset cycle, this is a straightforward upgrade that changes how the trigger feels and behaves under live fire.

The FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is also a solid choice for those building or upgrading an MP5 clone that accepts SEF packs. Because it uses the standard SEF geometry, it drops into most aftermarket and factory SEF housings without fitting issues. Just verify your host firearm uses the SEF trigger pack format before ordering.

Shipping & FFL

This FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is classified as a firearm component and ships directly to your door. No Federal Firearms License (FFL) transfer is required for the trigger pack itself. However, Illinois state law requires that all trigger mechanisms be transferred in compliance with local regulations. You must ensure that possession and use of this trigger are legal in your municipality and county. We recommend consulting with a local firearms attorney if you have any questions regarding Illinois-specific restrictions on trigger systems. By placing an order, you certify that you are legally eligible to purchase and possess this product under all applicable federal, state, and local laws.