Description

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 represents a precision-engineered upgrade for HK-platform roller-delayed blowback firearms. Manufactured by Rare Breed, this trigger system delivers a distinct forced-reset mechanism that resets the trigger forward under recoil, enabling rapid follow-up shots while maintaining semi-automatic compliance. Designed specifically for the MP5, MP5K, SP5, and SP5K, the FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K installs directly into the factory trigger housing without permanent modification.

Overview

The FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is Rare Breed’s latest advancement in forced reset trigger technology. It features a three-position selector (Safe, Semi, Forced Reset) and an ambidextrous safety lever that accommodates both right- and left-handed shooters. The two-stage trigger pull provides a defined take-up before the wall, followed by a crisp break. In the forced reset position, the trigger resets forward automatically during the firing cycle, allowing the shooter to maintain trigger contact for faster cycling without altering the firearm’s semi-automatic classification.

Features & Specs

• Three-position selector: Safe, Semi-automatic, and Forced Reset mode. The forced reset position mechanically pushes the trigger forward after each shot, requiring the shooter to release and re-engage for the next round.
• Ambidextrous safety selector designed for the HK MP5, MP5K, SP5, and SP5K. Left-handed shooters can operate the selector without changing grip or swapping components.
• Two-stage trigger pull with a clean 2.5-3.5 lb first stage and a crisp 4-5 lb second stage break. Includes a positive reset tactile and audible click in semi-automatic and forced reset modes.
• Drop-in design: Fits factory HK trigger housings for MP5, MP5K, SP5, and SP5K variants. No permanent modification, drilling, or gunsmithing required for installation.
• Constructed from heat-treated steel and billet aluminum with a Mil-Spec hard coat anodized finish. Rated for 10,000+ cycles with standard pressure 9mm ammunition.
• Includes ambidextrous trigger shoe with a curved face for consistent finger placement. Trigger shoe width is 0.250 inches for compatibility with standard trigger guards.

Who It’s For

The FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is intended for shooters who demand faster follow-up shots without transitioning to a full-auto or binary trigger system. It is suitable for competitive shooters in USPSA or 3-Gun matches who want to reduce split times on HK-platform PCCs. Law enforcement and security professionals may find the forced reset mode useful for controlled rapid fire in training scenarios. Collectors and enthusiasts with SP5, SP5K, or MP5 clones will appreciate the drop-in compatibility and ambidextrous operation. This trigger is designed for experienced shooters who understand trigger discipline and safe firearm handling practices.

Shipping & FFL

This trigger is a firearm component and does not require transfer through a Federal Firearms License (FFL) holder if shipped to a residential address. Rare Breed triggers ship directly from our warehouse via UPS Ground or FedEx Ground. All sales are final. Buyers are responsible for verifying compliance with local, state, and federal laws before purchasing. The FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is legal for sale in most states; however, some jurisdictions restrict forced reset trigger systems. Check your state and local regulations prior to ordering. We do not ship to P.O. boxes, APO/FPO addresses, or locations with known trigger restrictions. By purchasing this product, you confirm that you are at least 18 years of age and legally eligible to own firearm components in your jurisdiction.