Description

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

The FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K represents a significant advancement in trigger technology for roller-delayed blowback platforms. Engineered by Rare Breed, this drop-in assembly replaces the factory trigger pack in your MP5, MP5K, SP5, or SP5K without permanent modification. The FRT-RD3 (SEF) operates on a two-stage, three-position selector (Safe, Semi, Forced Reset) and delivers a distinct forced-reset cycle that returns the trigger forward under spring tension immediately after each shot. This design allows the shooter to maintain a consistent finger position while the trigger resets independently, enabling rapid follow-up shots while remaining a semi-automatic configuration. The housing is built to SEF (Navy) pattern specifications, making it compatible with standard SEF lower housings and trigger packs on HK-pattern firearms.

Overview

The FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is a precision-machined drop-in unit that replaces the entire trigger pack assembly. It requires no permanent alterations to your firearm and installs using standard tools. The three-position selector provides Safe, Semi-Automatic, and Forced Reset modes. In forced reset mode, the trigger mechanism physically pushes the trigger shoe forward after each hammer release, allowing the shooter to simply maintain rearward pressure on the trigger to fire again as soon as the bolt closes. This mechanical reset is consistent and repeatable, independent of the shooter’s trigger finger return speed. Rare Breed has designed this unit specifically for the HK MP5 platform, accounting for the unique bolt carrier geometry and hammer profile required for reliable forced reset function.

Features & Specs

• Drop-In Design: Complete trigger pack assembly. No permanent modifications to your HK MP5, MP5K, SP5, or SP5K receiver or lower housing. Installs directly into SEF-pattern trigger housings.
• Three-Position Selector: Safe, Semi-Automatic (standard single-shot), and Forced Reset (mechanical forward reset after each hammer fall). Selector markings are clear and tactile for positive mode identification.
• Two-Stage Pull: The trigger features a distinct two-stage take-up with a defined wall before the break. In forced reset mode, the first stage is eliminated, providing a consistent short-reset feel.
• Durable Construction: Machined from billet steel and aluminum components. Hardened sear and hammer surfaces. Nickel-Teflon coated trigger components for reduced friction and corrosion resistance.
• SEF (Navy) Pattern Compatibility: Designed for standard SEF trigger housings. Fits MP5, MP5K, SP5, and SP5K models with SEF lower configuration. Not compatible with ambidextrous or push-pin style housings without modification.
• Manufacturer: Rare Breed. Category: Triggers. Made in the United States.

Who It’s For

This trigger is designed for experienced shooters who own HK MP5, MP5K, SP5, or SP5K firearms and want to explore the mechanical forced reset system without permanently altering their firearm. It is intended for range use, training, and competition where rapid semi-automatic fire is permitted. The FRT-RD3 (SEF) is not a full-auto device and is not designed for law enforcement or military duty cycles. It is suited for shooters who understand trigger mechanics, are comfortable with drop-in trigger installation, and want a repeatable, consistent forced reset function in their roller-delayed platform. Users should be familiar with the legal classification of forced reset triggers and verify compliance with all applicable federal, state, and local laws before purchase or installation.

Shipping & FFL

This FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is classified as a firearm component and is not a firearm frame or receiver. As such, it does not require transfer through a Federal Firearms License (FFL) dealer for shipment. Rare Breed triggers ship directly to your residential or business address in all states where legal possession is permitted. You are solely responsible for verifying that this product is legal to own in your jurisdiction. No FFL transfer fee, background check, or dealer involvement is required for this trigger pack. Standard shipping rates apply. We do not ship to states or localities that have enacted restrictions on forced reset triggers or mechanical reset trigger systems. By purchasing, you certify that you are legally eligible to possess this item and will comply with all applicable laws.