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 is a purpose-built drop-in unit designed exclusively for the HK MP5, MP5K, SP5, and SP5K platforms. Developed by Rare Breed, this trigger system introduces a two-stage, three-position selector that delivers a forced reset cycling mechanism. It utilizes the SEF (Single, E-Fire, Fire) lower frame configuration, ensuring direct compatibility without permanent modifications to your firearm. This component is engineered for users who demand a predictable, repeatable trigger pull under rapid fire conditions.

Features & Specs

The FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is built with precision-machined steel components and a hardened hammer. The two-stage design provides a distinct wall before break, while the third position enables the forced-reset function, returning the trigger forward under recoil. Below are the key specifications and features.

• Manufacturer: Rare Breed | Category: Triggers | Platform: HK MP5, MP5K, SP5, SP5K (SEF lower required)
• Three-position selector: Safe, Semi-Automatic, and Forced Reset (3rd position)
• Two-stage trigger pull with a defined first stage take-up and a crisp second stage break

• Drop-in installation with no permanent modification to the host firearm; uses factory trigger housing and pins
• Heat-treated steel trigger, hammer, and disconnector for durability under sustained use
• Compatible with select-fire SEF trigger pack housings; not compatible with ambidextrous or navy-style lowers

• Forced reset mode: trigger resets forward automatically after each shot without manual release
• Weight: approximately 6.5 oz | Finish: phosphate and manganese parkerized
• Includes replacement trigger, hammer, disconnector, and selector lever for the SEF configuration

Who It’s For

This FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is intended for experienced shooters and collectors who own an MP5, MP5K, SP5, or SP5K with a standard SEF trigger pack. It is suited for those who train at controlled ranges and require a trigger that maintains positive sear engagement during high-speed strings. The forced reset function is designed for shooters who understand manual of arms for non-standard trigger systems and who comply with all applicable federal, state, and local laws. This product is not intended for casual plinking or general-purpose hunting.

Shipping & FFL

This item ships via UPS or FedEx ground with signature required. All FRT-RD3™ (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K orders are processed within 1-2 business days. Because this product is a trigger assembly and not a firearm frame or receiver, it does not require transfer through a Federal Firearms License (FFL) dealer for shipment. However, you are solely responsible for ensuring compliance with all applicable laws in your jurisdiction. Rare Breed and this retailer assume no liability for improper installation, misuse, or noncompliance with local regulations. Check your state and local laws before ordering.