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

Designed and manufactured by Rare Breed, the FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger is built specifically for the HK MP5, MP5K, SP5, and SP5K platforms. This trigger system operates using a forced-reset mechanism that returns the trigger forward after each shot without manual reset, enabling rapid follow-up shots while maintaining semi-automatic compliance. It is engineered for shooters who demand precision and speed from their roller-delayed firearm.

Overview

The FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger replaces factory trigger packs in all standard HK MP5, MP5K, SP5, and SP5K models equipped with SEF (Selbstladepistole Einzelfeuer) lower housings. It provides three selectable positions: Safe, Semi-Automatic, and Forced Reset. In the forced reset mode, the trigger mechanism uses bolt carrier movement to reset the trigger shoe forward, allowing the shooter to fire again with a short, consistent pull. This design is drop-in ready and requires no permanent modification to the host firearm.

Features & Specs

• Three-position selector: Safe, Semi, and Forced Reset (FRT) mode, with crisp two-stage break in semi-automatic operation
• Drop-in installation for HK MP5, MP5K, SP5, and SP5K SEF lower housings; no permanent modifications required
• Constructed from heat-treated steel and hardened alloy components with Mil-Spec coatings for corrosion and wear resistance

Manufacturer: Rare Breed
Category: Triggers
Compatibility: HK MP5, MP5K, SP5, SP5K with SEF trigger pack housing

Each FRT-RD3 unit undergoes factory function testing to ensure reliable forced-reset cycling across varied ammunition types. The two-stage design provides a clean take-up with a defined wall before break, giving the operator tactile feedback in all modes. The forced reset function is mechanically driven by the bolt carrier, eliminating dependence on electronic components or external power.

Who It’s For

This trigger is intended for experienced shooters and firearm owners in Ohio who own an HK MP5, MP5K, SP5, or SP5K and seek a performance upgrade without sacrificing reliability. It is suitable for competitive shooters, range enthusiasts, and collectors who understand the mechanical operation of forced-reset trigger systems. The FRT-RD3 is not a binary trigger, does not convert the firearm to full automatic, and is not designed for use with unregulated accessories. This product is legal for purchase and use in Ohio, provided the host firearm is owned in compliance with all applicable federal, state, and local laws. Purchasers must be at least 18 years of age for long guns and 21 years of age for handguns, and must pass a federal background check at the time of transfer.

Shipping & FFL

This FRT-RD3 trigger is classified as a firearm component and is not itself a firearm frame or receiver. It can be shipped directly to your address in Ohio. However, because this product interfaces with the fire control group, we recommend verifying local regulations prior to purchase. Some jurisdictions may impose restrictions on forced-reset trigger mechanisms. Any FFL transfer required for the host firearm is the responsibility of the buyer. We ship via insured carrier within 1-2 business days of order processing. All sales are final once the product has shipped.

Important FFL Disclaimer: By purchasing this product, you confirm that you are legally eligible to own firearms and firearm components under federal law and the laws of the State of Ohio. You assume all responsibility for compliance with applicable regulations. If you have questions regarding the legal status of this trigger in your jurisdiction, consult a qualified attorney before ordering.