Description

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

Designed for shooters who demand precision and speed from their roller-delayed platform, the FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K delivers a distinct mechanical advantage. Engineered by Rare Breed, this drop-in trigger system converts the factory semi-automatic fire control group into a forced-reset system that provides a crisp, two-stage break with a third selector position. This unit is built exclusively for standard SEF (Navy-style) grip housings and is machined to tight tolerances for reliable function in HK-pattern firearms.

Overview

The FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K redefines the shooting experience by combining a two-stage trigger pull with a mechanical forced-reset cycle. Unlike traditional triggers, the hammer follows the bolt forward during the reset, allowing the shooter to maintain consistent trigger finger placement. This system operates from a safe, semi-automatic, and a third position that enables the forced-reset function. Each unit ships as a complete drop-in assembly, requiring no permanent modification to the host firearm. Rare Breed has engineered this trigger to function within the mechanical limits of the MP5 platform while maintaining compliance with all current federal firearm regulations.

Features & Specs

• Two-Stage Pull: The trigger offers a distinct take-up stage followed by a crisp, glass-like break. The forced-reset mechanism returns the trigger forward automatically after each shot, providing consistent pull weight and travel on every round.
• 3-Position Selector: The selector switch includes safe, semi-automatic, and a third position (marked with a bullet or FRT indicator) that enables the forced-reset cycle. The selector uses standard SEF geometry for compatibility with existing aftermarket grip modules.
• Drop-In Installation: The complete fire control group installs directly into factory SEF trigger housings without drilling, filing, or permanent modification. Installation requires basic armorer tools and takes approximately 15 minutes for experienced users.
• Manufacturer: Rare Breed — Known for precision CNC-machined trigger components built from 4140 steel and heat-treated for durability. Each unit undergoes function testing before shipment.
• Category: Triggers — This product is classified as a firearm trigger assembly and must be installed by a qualified individual familiar with the MP5 platform.

Who It Is For

This trigger is intended for experienced shooters, competition competitors, and firearms enthusiasts who own HK MP5, MP5K, SP5, or SP5K models with standard SEF grip housings. It is ideal for users who want to increase their rate of fire while maintaining shot-to-shot accuracy through a predictable, two-stage trigger pull. The FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is also suited for collectors and builders completing an HK clone or factory build with an SEF lower. This product is not recommended for novice shooters or those unfamiliar with forced-reset trigger operation. All users should read the included manual thoroughly and practice dry-fire drills before live-fire use.

Shipping & FFL

The FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K ships directly to your door. No Federal Firearms License (FFL) transfer is required for this trigger assembly, as it is classified as a firearm component and not a complete firearm frame or receiver. However, state and local laws vary. It is your responsibility to verify that this product is legal to own and install in your jurisdiction. Some states and municipalities may have restrictions on forced-reset triggers, binary triggers, or high-rate-of-fire devices. By purchasing this item, you certify that you are compliant with all applicable laws in your area. Rare Breed recommends consulting with a firearms attorney if you have any legal questions. Standard shipping rates apply. All sales are final once the trigger has been installed or removed from its packaging.