Description

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

Rare Breed continues to push the boundaries of performance-driven trigger systems with the FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger, purpose-built for the HK MP5, MP5K, SP5, and SP5K platforms. Engineered for shooters who demand precise control and rapid follow-up shots, this drop-in trigger assembly delivers a patented forced-reset mechanism without modifying your firearm’s internal components. Whether you are building a competition-ready PDW or upgrading a defensive carbine, the FRT-RD3 provides a distinct mechanical advantage through its ambidextrous design and three-position selector configuration.

Overview

The FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger represents Rare Breed’s latest advancement in roller-delayed blowback trigger technology. Unlike standard triggers that rely on a single-stage pull, this system incorporates a two-stage break with a forced-reset function that automatically returns the trigger forward after each shot, enabling rapid, controlled firing strings. The ambidextrous selector accommodates left- and right-handed operators, while the three-position configuration (Safe, Semi-Automatic, Forced Reset) offers clear tactical versatility. Designed exclusively for HK MP5, MP5K, SP5, and SP5K variants, this unit requires no permanent modifications and installs directly into the factory trigger housing.

Features & Specs

• Two-stage trigger with forced-reset technology: first stage take-up followed by a crisp second stage break; trigger automatically resets forward after each discharge, reducing reset travel for faster subsequent shots.
• Ambidextrous three-position selector: Safe, Semi-Automatic (standard single-shot), and Forced Reset mode; left-side and right-side levers operate independently for true ambi functionality.
• Drop-in installation: no gunsmithing, drilling, or permanent alteration required; compatible with OEM HK trigger housings on MP5, MP5K, SP5, and SP5K models.

Additional specifications: manufactured by Rare Breed under the Triggers category; constructed from heat-treated steel and aircraft-grade aluminum with a corrosion-resistant finish; positive detent engagement for each selector position; tested for reliability across various ammunition types and roller-lock timing.

Who It’s For

This trigger system is intended for experienced shooters who own an HK MP5, MP5K, SP5, or SP5K and seek enhanced performance in competitive shooting, tactical training, or defensive applications. The FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K appeals to operators who value mechanical precision over aftermarket modifications that alter fire control group geometry. It is also suited for collectors and enthusiasts who want to maximize the cyclic potential of their roller-delayed platform without sacrificing safety or reliability. Due to the forced-reset mechanism, users should be familiar with proper trigger discipline and have experience with high-round-count shooting sessions.

Shipping & FFL

This product is classified as a firearm component and ships directly to your door. No Federal Firearms License (FFL) transfer is required for this trigger assembly, as it does not constitute a firearm frame or receiver. However, you must verify that the installation of an aftermarket trigger complies with all applicable state and local laws. Rare Breed recommends consulting with a qualified gunsmith if you are uncertain about compatibility with your specific HK model. All orders are processed within one to two business days, and standard shipping rates apply to contiguous United States addresses. International shipping is not available for this item.

FFL Transfer Disclaimer: The FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger is sold as a firearm part and does not require an FFL transfer under current federal regulations. State and local restrictions may apply. By purchasing this item, you acknowledge that you are legally permitted to own and install this component in your jurisdiction. Rare Foot Firearms assumes no liability for misuse or non-compliance with local laws.