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

Engineered for the HK roller-delayed platform, the FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger delivers a distinct, repeatable shooting experience that demands precision and control. Designed by Rare Breed, this trigger system leverages forced-reset technology to allow the shooter to maintain a consistent, rapid cycle rate while retaining the ability to fire from a traditional semi-automatic reset. Built for the HK MP5, MP5K, SP5, and SP5K, the FRT-RD3 (SEF) is a direct-drop-in upgrade for users who require a higher level of trigger discipline and mechanical reliability.

Overview

The FRT-RD3 (SEF) is a two-stage, three-position forced reset trigger that redefines how the HK MP5 family performs under sustained fire. Unlike standard triggers, the forced reset mechanism physically returns the trigger forward after each shot, enabling a faster follow-up without sacrificing the tactile feedback of a two-stage pull. The three-position selector allows the shooter to choose safe, semi-automatic, and the unique forced reset mode, providing operational flexibility for range training, competition, or defensive use. This trigger is machined from hardened steel and aluminum components, ensuring long-term durability under high-round-count conditions.

Features & Specs

• Forced Reset Technology: The trigger mechanically resets forward after each discharge, allowing the shooter to maintain a consistent firing rate by controlling the reset point rather than relying on spring return alone.
• Two-Stage Pull: A distinct take-up stage followed by a crisp, clean break provides predictable trigger control, reducing the likelihood of unintentional discharges during rapid fire.
• Three-Position Selector: Positions include Safe, Semi-Automatic, and Forced Reset mode, giving the user clear tactile and visual confirmation of the selected firing mode.

• Compatibility: Direct fit for HK MP5, MP5K, SP5, and SP5K models using SEF (Navy-style) trigger housing. No permanent modification to the firearm is required.
• Materials: CNC-machined 4140 steel hammer and disconnecter, 7075 aluminum housing, and stainless steel springs for corrosion resistance and extended service life.
• Installation: Drop-in design with included pins and springs; installation can be completed with basic armorer tools and knowledge of HK trigger group assembly.

• Manufacturer: Rare Breed
• Category: Triggers
• Weight: Approximately 3.2 ounces
• Trigger Pull Weight: Factory set at approximately 4.5 to 5.5 pounds

Who It’s For

The FRT-RD3 (SEF) is designed for experienced shooters who demand a higher level of control and repeatability from their HK roller-locked platform. It is suitable for competitive shooters in divisions that allow forced reset triggers, as well as for training environments where rapid, accurate follow-up shots are required. This trigger is also intended for collectors and enthusiasts who appreciate mechanical innovation and want to explore the full capability of their MP5, MP5K, SP5, or SP5K. Law enforcement and military personnel seeking a trigger that provides a consistent, fast reset without altering the fundamental semi-automatic function of the firearm will find the FRT-RD3 (SEF) a reliable upgrade. It is not recommended for novice shooters or those unfamiliar with forced reset mechanics, as proper training is essential to operate this trigger safely and effectively.

Shipping & FFL

This FRT-RD3 (SEF) trigger is classified as a firearm component and is not a complete receiver or frame. It can be shipped directly to your residential or business address without requiring transfer through a Federal Firearms License (FFL) dealer. However, you must be at least 18 years of age to purchase, and all applicable federal, state, and local laws regarding trigger purchases must be followed. Some states and localities have enacted restrictions on forced reset triggers or binary triggers; it is your responsibility to verify that this product is legal to own and use in your jurisdiction before placing an order. Rare Breed and this retailer disclaim any liability for non-compliance with local regulations. By purchasing this product, you acknowledge that you are in compliance with all applicable laws and that no FFL transfer is required for this trigger assembly.