Description

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

If you are running an HK roller-delayed platform, you already know the trigger is often the weak link. The FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K changes that equation entirely. Built by Rare Breed, this drop-in unit gives you the crisp, predictable break of a two-stage trigger with the unique forced-reset cycling that keeps your finger moving naturally. It is designed specifically for the SEF trigger housing found on full-size MP5s, compact MP5Ks, and their civilian SP5 and SP5K counterparts. No guesswork, no fitting headaches—just a solid, repeatable pull that rewards a smooth trigger hand.

Overview

The FRT-RD3 is not your standard drop-in trigger. It is a three-position selector system that combines a safe position, a semi-automatic mode, and a forced-reset mode that uses the bolt’s rearward travel to positively reset the trigger shoe. This means the trigger resets before you fully release it, allowing for faster follow-up shots without the “slam fire” feel of some binary triggers. The two-stage design gives you a clean take-up and a defined wall before the break, making it equally suited for precise single shots and controlled pairs. Rare Breed engineered this unit to work with the SEF trigger pack geometry, so it installs directly into your HK-style lower without modification.

Features & Specs

• Three-position selector: Safe, Semi, and Forced Reset. The forced reset mode uses the bolt carrier to mechanically reset the trigger, creating a consistent and repeatable cycling rhythm.
• Two-stage trigger pull: A short, smooth first stage transitions into a crisp second-stage break. The forced reset action does not interfere with the two-stage feel during standard semi-auto fire.
• Drop-in design for SEF housings: Compatible with HK MP5, MP5K, SP5, and SP5K models that use the standard SEF trigger pack. No permanent modifications required to your firearm.

Who It’s For

This trigger is for the shooter who spends serious time behind an HK roller gun. Whether you are running drills at the range, competing in subgun matches, or simply want a more responsive trigger for your SP5, the FRT-RD3 fits the bill. It is not a gimmick—it is a tool for shooters who understand trigger control and want a faster reset without sacrificing accuracy. If you have already upgraded your stock trigger and found it lacking in speed or consistency, this unit gives you a legitimate performance edge. It also appeals to collectors and builders who want to keep their HK platform period-correct while adding modern mechanical performance.

Shipping & FFL

This FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K ships directly to your door. Because it is a firearm component and not a complete firearm, no FFL transfer is required for shipment to most states. However, you are responsible for confirming that this trigger is legal in your state, county, and municipality. Some jurisdictions restrict forced reset triggers or three-position selectors, and local laws vary widely. We do not ship to any location where this product is prohibited. By placing this order, you certify that you are legally eligible to own this component and that your local laws allow its possession. If you have any questions about your specific situation, contact your local firearms authority before ordering.

• No FFL transfer fee required for most customers. Ships direct with standard shipping.
• Check your local and state laws before purchase. Some states restrict forced reset trigger systems.
• We cannot ship to P.O. boxes. A physical shipping address is required.