Description

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

Overview

The Rare Breed FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger represents a precision-engineered upgrade for HK-pattern roller-delayed blowback platforms. Designed specifically for the MP5, MP5K, SP5, and SP5K, this trigger system utilizes a forced-reset mechanism that re-engages the sear immediately after each shot, enabling rapid follow-up shots while maintaining semi-automatic compliance. Constructed to Mil-Spec durability standards, the FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 and SP5K replaces the factory trigger pack without permanent modifications, offering a distinct three-position selector configuration for enhanced operational versatility.

Features and Specifications

The FRT-RD3 (SEF) trigger assembly integrates Rare Breed’s proprietary forced-reset technology within a two-stage trigger bow, providing a crisp, defined break followed by automatic reset during the return stroke. This system allows the shooter to focus on trigger manipulation without manually cycling the sear between shots.

• Three-position selector (Safe, Semi-Automatic, Forced Reset) with SEF (Sicher/Erstfeuer/Feuer) marking pattern, compatible with standard MP5 lower housings
• Two-stage trigger pull: first stage take-up of approximately 2.5 lbs, followed by a clean second-stage break at 4.5 lbs total pull weight (factory specification)
• Machined from 4140 steel with a black nitride finish; includes all necessary springs, pins, and detents for direct drop-in installation in MP5, MP5K, SP5, and SP5K platforms

This FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 and SP5K is manufactured to ATF-compliant specifications and does not alter the firearm’s semi-automatic classification when used as intended. The forced-reset function requires the shooter to maintain forward pressure on the trigger after each shot, allowing the sear to re-engage automatically without manual reset.

• Overall trigger pack width: 1.25 inches; weight: 4.2 ounces (complete assembly)
• Compatible with factory HK and licensed clones (MKE, PTR, Zenith) using standard SEF trigger housing dimensions
• Includes rare breed lifetime warranty against manufacturing defects; no gunsmith fitting required for most standard lower receivers

Who It Is For

The FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger is intended for experienced shooters and firearms enthusiasts who own HK-pattern roller-delayed platforms and seek to optimize their trigger control for competitive shooting, training, or range applications. This product is best suited for individuals who understand forced-reset trigger mechanics and can safely manage the distinct cycling characteristics of the system. It is not recommended for general-purpose defensive use or for shooters unfamiliar with forced-reset trigger operation. The trigger requires deliberate trigger discipline to prevent unintended discharge during the forced-reset cycle.

• Competitive shooters in USPSA, IDPA, or local action shooting matches requiring rapid target transitions
• HK SP5 and SP5K owners seeking a trigger upgrade that maintains factory manual of arms while adding a forced-reset capability
• Collectors and enthusiasts of Rare Breed trigger systems who require a drop-in solution for their MP5 or MP5K builds

Shipping and FFL

This FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 and SP5K is classified as a firearm component and not a regulated firearm receiver. It ships directly to your residential or business address within the United States. No Federal Firearms License (FFL) transfer is required for purchase or delivery of this trigger assembly. However, local, state, and municipal laws vary regarding trigger modifications and forced-reset mechanisms. It is the buyer’s sole responsibility to verify that ownership and installation of this product comply with all applicable federal, state, and local statutes. Rare Breed recommends consulting with a firearms attorney before purchasing if you are uncertain about your jurisdiction’s regulations. This product is not for sale or shipment to jurisdictions where forced-reset triggers are prohibited by law. By purchasing this item, you certify that you are legally eligible to own firearm components and that your location permits such ownership. All sales are final; no returns accepted on installed trigger assemblies.