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 significant advancement in precision trigger technology for roller-delayed blowback platforms. Engineered by Rare Breed, this drop-in assembly provides the operator with a definitive three-position selector system that gives the shooter precise control over trigger reset behavior. Designed specifically for HK MP5, MP5K, SP5, and SP5K variants, this trigger employs a forced reset mechanism that requires the shooter to release the trigger fully between shots, ensuring deliberate and controlled firing cycles. The ambidextrous configuration accommodates both right and left-handed operators without modification to the host firearm.

Overview

The FRT-RD3 (AMBI) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is a mechanical trigger system that operates through a two-stage pull with a distinct wall and crisp break. The three-position selector allows the user to choose between safe, standard semi-automatic fire, and the forced reset mode. In forced reset mode, the trigger mechanism physically resets the trigger forward after each shot, requiring the shooter to initiate a new trigger pull for each round. This system is built to MIL-spec tolerances and uses heat-treated steel components for extended service life. The unit is a complete drop-in assembly that replaces the factory trigger pack without permanent modification to the firearm.

Features & Specs

• Two-stage trigger pull with a 4.5 to 5.5 pound break weight, featuring a take-up stage followed by a defined wall before sear release; includes a three-position selector with safe, semi-automatic, and forced reset settings
• Ambidextrous safety selector lever suitable for left and right-handed shooters; CNC-machined from 4140 steel with a phosphate finish for corrosion resistance
• Drop-in design fits HK MP5, MP5K, SP5, and SP5K models without gunsmithing; includes all necessary springs and pins for installation

The FRT-RD3 (AMBI) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K utilizes Rare Breed's patented forced reset cam system that mechanically pushes the trigger shoe forward after each hammer fall. This design ensures consistent reset timing and eliminates trigger follow-through variation. The housing is constructed from 7075-T6 aluminum with a hardcoat anodized finish. The selector detent is spring-loaded for positive engagement in all three positions. This trigger is compatible with factory safety catches and does not require modification to the receiver.

• Forced reset cam mechanism: mechanical trigger reset independent of spring tension; tested to 10,000 cycles without degradation
• Three-position selector markings: Safe (S), Semi-Auto (1), Forced Reset (3); positive detent engagement at each position
• Overall dimensions: 3.25 inches length, 1.10 inches width, 2.00 inches height; weight 4.2 ounces

Who It's For

This trigger system is intended for experienced shooters who own HK MP5, MP5K, SP5, or SP5K firearms and require a precise, repeatable trigger mechanism with selectable operating modes. It is suitable for competitive shooting applications where split times and trigger control are critical, as well as for training environments that emphasize trigger discipline and reset management. The ambidextrous configuration serves operators who train with support-hand shooting or who require a symmetrical control interface. This product is designed for shooters who understand forced reset trigger operation and can maintain proper trigger finger discipline. It is not intended for general plinking or casual range use without thorough familiarization.

Shipping & FFL

This FRT-RD3 (AMBI) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is classified as a firearm component and ships directly to the customer's residential or business address. No Federal Firearms License (FFL) transfer is required for this trigger assembly as it does not constitute a firearm frame or receiver under current Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) regulations. Customers must comply with all applicable federal, state, and local laws regarding the installation and use of this product. Some states and municipalities may have restrictions on forced reset triggers or trigger mechanisms with selectable modes. It is the purchaser's sole responsibility to verify legality in their jurisdiction before ordering. Rare Breed triggers are manufactured in the United States and are subject to all applicable export controls.