Description

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

The Rare Breed FRT-RD3 (AMBI) represents a precision-engineered advancement in trigger technology for roller-delayed blowback platforms. Specifically designed for the HK MP5, MP5K, SP5, and SP5K, this two-stage, three-position forced reset trigger delivers a distinct tactical advantage. It combines the crisp feel of a two-stage trigger with the unique forced-reset cycling that returns the trigger forward automatically after each shot. This allows the shooter to maintain a stable firing grip while achieving rapid, controlled follow-up shots. The ambidextrous safety selector ensures full usability for left- and right-handed operators.

Overview

The FRT-RD3 (AMBI) is a drop-in trigger assembly built around Rare Breed’s patented forced-reset mechanism. Unlike standard triggers, the forced-reset function re-engages the sear immediately after the bolt cycles, requiring only a deliberate release to the reset point before the next shot. The two-stage pull provides a distinct take-up wall, followed by a clean break. The three-position selector offers safe, semi-automatic, and forced-reset modes. This trigger is machined from billet steel and hardcoat anodized for durability in adverse conditions. It is a direct replacement for factory trigger packs in MP5, MP5K, SP5, and SP5K variants with no permanent modification required.

Features & Specs

• Two-Stage Pull: First stage provides approximately 2.5 lbs of take-up; second stage breaks cleanly at approximately 4.5 lbs total pull weight, with minimal overtravel.
• Forced Reset Mechanism: The trigger resets forward automatically upon bolt carrier return, enabling a rapid cyclic rate without modifying the firearm’s internal components.
• Ambi Safety Selector: 90-degree throw with positive detents; includes extended and short lever options for both sides, compatible with standard HK lower housings.
• Three-Position Selector: Safe (rear), Semi-Automatic (center), and Forced-Reset (forward) positions clearly marked.
• Material & Finish: 8620 steel hammer and disconnector; 4140 steel trigger blade; Mil-Spec hardcoat anodized black finish.
• Compatibility: Fits HK MP5, MP5K, SP5, and SP5K models using factory or aftermarket trigger housings.

Who It’s For

This trigger is designed for experienced shooters who demand precise trigger control and increased split times in a compact PDW platform. It is suitable for competitive shooters in USPSA or PCC divisions where forced-reset technology is permitted, as well as for tactical trainers and enthusiasts seeking a training tool that reinforces trigger discipline. The ambidextrous layout makes it ideal for operators who shoot from non-dominant shoulders or run support-side drills. It is not intended for shooters unfamiliar with forced-reset mechanics; proper training on the specific manual of arms is strongly recommended.

Shipping & FFL

This FRT-RD3 (AMBI) trigger is a firearm component and ships directly to your door. No Federal Firearms License (FFL) transfer is required for purchase or delivery within the United States. However, you are responsible for verifying compliance with all state and local laws regarding forced-reset triggers. Some jurisdictions impose restrictions on trigger mechanisms that alter firing rates. By purchasing this product, you confirm that you are legally eligible to own it under all applicable laws. Rare Breed triggers are manufactured in the USA and are not classified as NFA items by the ATF as of the current date; however, regulatory status may change. Check your local statutes before ordering. We ship via UPS Ground with adult signature required.