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

Overview

The FRT-RD3™ (AMBI) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K represents a precision-engineered upgrade from Rare Breed. Designed specifically for the roller-delayed blowback platform, this forced reset trigger system delivers a distinct two-stage pull with a third selector position that enables a forced-reset cycling action. Each unit is machined to exacting tolerances, ensuring reliable function within the HK MP5, MP5K, SP5, and SP5K host weapons. This is a drop-in replacement component that maintains the factory safety selector orientation while introducing a controlled, repeatable trigger reset mechanism. For Illinois customers, this trigger is classified as a Title I firearm component and does not alter the legal classification of the host firearm under state or federal law.

Features & Specs

• True ambidextrous configuration: 3-position selector on both sides of the receiver, allowing full left- or right-handed operation without adapter plates or modification.
• Two-stage trigger pull: a defined take-up stage followed by a crisp break, with the third position activating the forced-reset function that returns the trigger forward under spring tension after each shot.
• Precision CNC-machined from billet steel and heat-treated for durability; includes all necessary pins and springs for direct installation in HK MP5, MP5K, SP5, and SP5K variants.

Who It’s For

This trigger is intended for experienced shooters and competition participants who own an HK MP5, MP5K, SP5, or SP5K and seek a more advanced trigger system. It is suited for shooters who understand forced-reset trigger mechanics and can maintain proper firearm handling discipline. The FRT-RD3™ (AMBI) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is not recommended for novice users or those unfamiliar with trigger reset systems. It is designed for law-abiding firearm owners in Illinois who operate their firearms at licensed ranges or on private property where such components are permitted. Always verify local ordinances before installation.

Features & Specs (continued)

• Manufacturer: Rare Breed | Category: Triggers | Material: Billet steel with QPQ black nitride finish for corrosion resistance.
• Drop-in design: no gunsmith fitting required; installation follows standard HK trigger pack disassembly procedures.
• Weight and pull characteristics are factory-set to Rare Breed’s specifications and are not user-adjustable to ensure consistent performance and regulatory compliance.

Features & Specs (continued)

• Compatible with factory and aftermarket lower receivers that accept standard HK MP5-style trigger packs. Tested with HK SP5 and SP5K factory configurations.
• Includes detailed installation guide and warranty information. Retains factory safety functionality in positions 1 (safe) and 2 (semi-automatic).
• Third position activates forced-reset mode. The FRT-RD3™ (AMBI) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is not a full-auto device and does not convert the host firearm to automatic fire.

Shipping & FFL

This trigger is a firearm component, not a complete firearm. It ships directly to your residential or business address in Illinois. No Federal Firearms License (FFL) transfer is required for purchase or delivery. However, Illinois law requires that all firearm parts and accessories comply with state and local regulations. By purchasing this product, you confirm that you are legally eligible to possess it under Illinois law and that your use will comply with all applicable statutes. Rare Breed and our retailer assume no liability for misuse or non-compliance. For questions regarding legal status in your jurisdiction, consult a qualified attorney before ordering. This product is sold as-is with no implied warranty beyond manufacturer defects. All sales are final. No returns accepted after installation.