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

The FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K from Rare Breed represents a precision-engineered upgrade for HK-platform pistols and carbines. Designed for shooters who demand consistent performance, this trigger system delivers a distinct two-stage pull with a forced-reset mechanism that allows rapid follow-up shots while maintaining control. Built to MIL-spec durability standards, the FRT-RD3 is a direct drop-in replacement that requires no permanent modification to your firearm.

Overview

Rare Breed has engineered the FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger specifically for the HK MP5, MP5K, SP5, and SP5K platforms. This trigger utilizes a three-position selector: safe, semi-automatic, and a forced-reset mode that resets the trigger forward after each shot without altering the firearm’s semi-automatic function. The ambidextrous design accommodates left- and right-handed shooters, and the two-stage pull provides a distinct take-up wall before a crisp break. Unlike standard triggers, the forced-reset feature returns the trigger to the ready position immediately, enabling faster cycling without compromising shot placement.

Features & Specs

Every component of the FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is machined from billet steel and heat-treated for extended service life. The trigger assembly includes an ambidextrous selector lever, a dual-stage sear mechanism, and a hardened hammer group. Below are the key specifications and features:

• Manufacturer: Rare Breed; Category: Triggers; Platform compatibility: HK MP5, MP5K, SP5, SP5K
• Three-position selector: Safe, Semi-Automatic, and Forced-Reset mode; ambidextrous safety lever included
• Two-stage trigger pull with defined take-up and a consistent break; forced-reset mechanism returns trigger forward after each cycle
• Drop-in design; includes all necessary pins and springs; no grinding or fitting required on standard HK lower receivers
• Heat-treated steel construction with a corrosion-resistant finish; rated for high-round-count use
• Patent-pending forced-reset geometry; engineered to function with factory HK bolt groups and hammer springs

Who It’s For

This trigger is intended for experienced shooters who own an HK MP5, MP5K, SP5, or SP5K and want a performance-oriented upgrade without converting their firearm to full-automatic. It is suitable for competitive shooters in divisions that allow forced-reset triggers, as well as enthusiasts who value trigger consistency and rapid reset during range sessions. The ambidextrous controls make it a practical choice for left-handed operators or those who train with both support and strong hands. It is not designed for use in firearms other than the listed HK roller-delayed blowback platforms, and installation should be performed by a qualified gunsmith or end user familiar with HK trigger group disassembly.

Shipping & FFL

This FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is classified as a firearm component and does not require transfer through a Federal Firearms License (FFL) dealer for shipment to most states. However, some state and local jurisdictions may have restrictions on forced-reset triggers or trigger components. It is the buyer’s sole responsibility to verify that this product is legal to own and install in their state, county, and municipality. Rare Breed and this retailer do not assume liability for compliance with local laws. By purchasing this product, you confirm that you are legally allowed to possess it. Standard shipping rates apply, and delivery is to the address provided at checkout. No FFL signature is required unless mandated by your state’s regulations.