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 the roller-delayed blowback platform. Developed by Rare Breed, this trigger system delivers a distinct mechanical firing cycle that combines a crisp two-stage break with a forced-reset return. Designed specifically for HK-pattern firearms, the FRT-RD3 retains the factory trigger housing footprint while introducing an ambidextrous configuration and three selectable positions for enhanced operational versatility.

Overview

The FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is a drop-in replacement unit that modifies the traditional trigger reset mechanism. In standard semi-automatic operation, the trigger resets automatically after each shot. In the forced-reset mode, the trigger blade is mechanically returned forward by the bolt carrier group during cycling, requiring the shooter to maintain deliberate trigger pressure for each subsequent round. This design provides a consistent, repeatable pull weight across all firing positions while maintaining compliance with applicable regulations. The ambidextrous selector accommodates left- and right-handed shooters without modification to the lower receiver.

Features & Specs

Each FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is machined from billet steel and finished with a corrosion-resistant coating. The two-stage pull offers a distinct take-up wall followed by a clean break, with the forced-reset function engaging only when the shooter maintains rearward pressure. The three-position selector includes safe, semi-automatic, and forced-reset modes, clearly marked for unambiguous identification.

• Manufacturer: Rare Breed | Category: Triggers | Platform: HK MP5, MP5K, SP5, SP5K (9mm)
• Ambidextrous three-position selector lever with positive detent engagement
• Two-stage trigger pull: first stage take-up approximately 2.5 lb, second stage break approximately 4.5 lb (measured at trigger shoe center)
• Forced-reset function activates only when bolt carrier group cycles fully rearward; does not alter semi-automatic fire rate
• Drop-in installation: no permanent modification to receiver; uses factory trigger housing and pins
• Includes stainless steel hammer, disconnector, trigger blade, selector lever, and all necessary springs

The FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K operates within the mechanical limits of the roller-delayed system. The forced-reset mechanism is calibrated specifically for the MP5 bolt carrier velocity and dwell time to ensure reliable function across standard-pressure and +P 9mm ammunition. Each unit undergoes factory function testing prior to packaging.

Who It Is For

This trigger system is intended for experienced shooters who require precise trigger control and understand the mechanical operation of forced-reset triggers. It is suited for competitive shooters in divisions that permit forced-reset devices, collectors of HK-pattern firearms seeking a performance upgrade, and training professionals who want to simulate increased shot cadence without modifying the firearm’s semi-automatic classification. Users should have mechanical proficiency for installation and a thorough understanding of their local, state, and federal firearms laws. The FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is not recommended for shooters unfamiliar with forced-reset trigger dynamics or those who prefer a standard single-stage trigger.

Shipping & FFL

This FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is a firearm component, not a complete firearm. It ships directly to your residence or business address via UPS Ground or FedEx Ground. No Federal Firearms License (FFL) transfer is required for purchase. However, the purchaser is solely responsible for verifying that this trigger system complies with all applicable federal, state, and local laws, statutes, and regulations prior to ordering. Some states and municipalities impose restrictions on forced-reset triggers, binary triggers, or devices that alter trigger reset function. By purchasing, you confirm that you are legally allowed to possess this item in your jurisdiction. Rare Breed and this retailer assume no liability for misuse or non-compliance with applicable laws.