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 your roller-delayed firearm. Manufactured by Rare Breed, this forced reset trigger system is designed for users who demand consistent, repeatable trigger performance without compromising on safety or reliability. Built specifically for the HK MP5, MP5K, SP5, and SP5K platforms, this ambidextrous trigger offers a unique three-position selector and a two-stage pull that resets under recoil, enabling rapid follow-up shots while maintaining a crisp, predictable break.

Overview

The FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is a drop-in replacement trigger that upgrades your firearm with a forced-reset mechanism. Unlike standard triggers that require the shooter to fully release the trigger before resetting, the FRT-RD3 uses the firearm’s recoil impulse to mechanically reset the trigger shoe forward. This allows for a faster cycling of the trigger finger during sustained fire. The ambidextrous safety selector accommodates both left- and right-handed shooters, and the three-position configuration provides safe, semi-automatic, and forced-reset modes. Each unit is machined from heat-treated steel and billet aluminum components for long-term durability under high-round-count conditions.

Features & Specs

• Three-position selector: safe, semi-automatic, and forced-reset (FRT) mode. The forced-reset position enables the trigger to reset forward under recoil, allowing for rapid, controlled fire without modifying the firearm’s internal operating system.
• Two-stage trigger pull: first stage take-up is smooth and light, followed by a defined second-stage wall and clean break. The reset is tactile and audible, providing clear feedback to the shooter.
• Ambidextrous design: fully ambidextrous safety selector and trigger mechanism are compatible with left- and right-handed shooters. No additional parts or modifications are required for left-hand operation.
• Drop-in installation: no gunsmithing required. Trigger housing and components are pre-assembled and fit directly into standard HK MP5, MP5K, SP5, and SP5K lower receivers. Includes all necessary pins and springs.
• Manufacturer: Rare Breed. Category: Triggers. Material: heat-treated steel hammer and sear, billet aluminum trigger shoe. Weight: approximately 4.2 ounces. Finish: matte black nitride for corrosion resistance.

Who It’s For

This trigger is intended for experienced shooters and firearms enthusiasts in Ohio who own an HK MP5, MP5K, SP5, or SP5K and are looking to enhance their trigger system for competitive shooting, training, or range use. The ambidextrous design makes it suitable for both right-handed and left-handed operators. The FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is also appropriate for collectors and builders who want a high-performance trigger that retains the classic roller-delayed operating characteristics of their firearm. It is not recommended for inexperienced shooters or for use in firearms that are not specifically listed as compatible. Users should be familiar with forced reset trigger operation and local firearms regulations before installation.

Shipping & FFL

This product is classified as a firearm component and may be shipped directly to your address in Ohio without requiring a Federal Firearms License (FFL) transfer for the trigger itself. However, if the trigger is installed into a complete lower receiver that is serialized, that lower receiver must be transferred through a licensed FFL dealer. It is the customer’s responsibility to verify all applicable federal, state, and local laws regarding the possession and installation of this trigger in their firearm. Rare Breed recommends consulting with a qualified firearms attorney or your local FFL dealer before purchase. Standard shipping rates apply. Orders are processed within 1-3 business days. No returns or exchanges on installed or modified trigger components.