Description

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

If you own an HK MP5, MP5K, SP5, or SP5K, you already know the platform demands precision. The FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger from Rare Breed is designed to give you a distinct mechanical advantage without compromising your grip or control. This isn’t a gimmick; it is a purpose-built trigger system that changes how you interact with the firearm. Whether you are a collector, a competitor, or a serious enthusiast, this trigger delivers a unique shooting experience that is both repeatable and reliable.

Overview

The FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is Rare Breed’s latest evolution in forced reset technology. It uses a two-stage, three-position selector that gives you safe, semi-automatic, and forced reset modes. In the forced reset position, the trigger physically pushes your finger forward after each shot, forcing you to release and reset before you can fire again. This creates a fast, consistent cycle that stays firmly in your control. It is machined from billet steel and designed to drop into your existing SEF trigger housing with minimal fitting. This is a direct replacement for your factory trigger pack, not a modification of the lower receiver.

Features & Specs

• Three-position selector: Safe, Semi, and Forced Reset. The forced reset position uses a mechanical cam to push the trigger shoe forward after each shot, forcing a complete reset before the next round can fire.
• Two-stage trigger pull: A distinct first stage take-up followed by a crisp second stage break. The reset is short and positive in semi mode, while the forced reset mode provides a consistent, repeatable cycle.
• Drop-in design for SEF trigger housings: Fits standard HK MP5, MP5K, SP5, and SP5K models with SEF (Semi, Auto, Fire) lower receivers. No permanent modifications to the firearm are required.

• Manufacturer: Rare Breed
• Category: Triggers
• Material: Billet steel with a black nitride finish for corrosion resistance and long service life
• Compatibility: HK MP5, MP5K, SP5, SP5K (SEF trigger pack pattern)

Who It’s For

This trigger is built for shooters who want more from their roller-delayed platform. If you have spent time behind an MP5 or SP5, you know the factory trigger leaves room for improvement. The FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is ideal for those who train regularly, compete in action shooting sports, or simply enjoy pushing their hardware to its limits. It is also a strong choice for collectors who appreciate engineering that respects the original design while adding modern capability. If you are comfortable with your manual of arms and want a trigger that rewards discipline and practice, this is for you. It is not a beginner-friendly modification; it demands familiarity with the platform and a willingness to learn a new cadence.

Shipping & FFL

This item ships directly to your doorstep. No FFL transfer is required because the FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is not a firearm or a firearm receiver. It is a trigger component and can be shipped to any valid address in the United States. However, you must comply with all federal, state, and local laws regarding the installation and use of this product. Some states or municipalities may have restrictions on forced reset triggers or trigger modifications. It is your responsibility to verify legality before ordering. Rare Breed and our retailer assume no liability for misuse or non-compliance. If you have any questions about your local laws, contact us before placing your order.