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

Designed and manufactured by Rare Breed, the FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger delivers a distinct shooting experience for the HK MP5, MP5K, SP5, and SP5K platforms. This forced reset trigger system provides a three-position selector that enables safe, semi-automatic, and forced-reset fire modes. Built for reliability and consistent performance, this trigger is a drop-in upgrade for compatible HK-pattern firearms.

Overview

The FRT-RD3™ (SEF) is a two-stage forced reset trigger engineered specifically for HK MP5, MP5K, SP5, and SP5K models. It utilizes a mechanical forced-reset function that returns the trigger forward after each shot, allowing for rapid follow-up shots while maintaining compliance with applicable laws. The three-position selector includes safe, semi-automatic, and forced-reset modes. Each unit is assembled by Rare Breed and tested for function prior to shipment.

Features & Specs

• Manufacturer: Rare Breed; Category: Triggers
• Two-stage trigger design with a three-position selector (safe, semi-automatic, forced-reset)
• Drop-in installation for HK MP5, MP5K, SP5, and SP5K platforms; no permanent modification required
• Constructed from heat-treated steel and precision-machined components for durability
• Forced-reset function uses the firearm’s recoil energy to reset the trigger, enabling controlled rapid fire
• SEF (Sicher, Einzelfeuer, Feuerstoss) pattern selector lever compatible with standard HK lower receivers
• Includes all necessary springs, pins, and instructions for installation

Who It’s For

This trigger is intended for Florida-based firearms owners who possess a legally owned HK MP5, MP5K, SP5, or SP5K and seek a reliable forced-reset trigger system. It is suitable for competitive shooters, range enthusiasts, and collectors who want to enhance their shooting experience with a proven mechanical design. The FRT-RD3™ (SEF) is not recommended for duty or self-defense applications due to its specialized fire mode characteristics. Buyers must comply with all federal, state, and local laws regarding ownership and use of forced reset triggers in Florida.

• Designed for civilian legal ownership in Florida when used in compliance with state and federal regulations
• Ideal for range use and competitive shooting events that permit forced-reset triggers
• Requires a standard HK SEF-style lower receiver; not compatible with ambidextrous or push-pin selectors

Shipping & FFL

This FRT-RD3™ (SEF) trigger will ship directly to your residential or business address within Florida. No Federal Firearms License (FFL) transfer is required for this item as it is a firearm component and not a complete firearm. However, you must verify that your local jurisdiction permits the ownership and use of forced reset triggers. Rare Breed and our company assume no liability for non-compliance with state or local laws. By purchasing this product, you certify that you are not prohibited from possessing firearm parts and that you will install and use this trigger only in compliance with all applicable laws.

• Ships directly to Florida addresses; no FFL required
• Buyer is solely responsible for verifying legality in their locality
• Standard shipping rates apply; expedited options available at checkout