Description

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

Overview

Rare Breed introduces the FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K, a precision-engineered drop-in trigger system designed for the HK roller-delayed platform. This forced reset trigger (FRT) leverages Rare Breed’s proprietary two-stage, three-position mechanism to deliver a distinct binary firing cadence without requiring modifications to the host firearm. The ambidextrous safety selector accommodates left- and right-handed shooters, while the 3-position configuration allows for safe, semi-automatic, and forced reset operation. Built from 4140 steel with a QPQ corrosion-resistant finish, the FRT-RD3 maintains HK-spec hammer and sear engagement tolerances for reliable ignition across 9mm and .22LR caliber variants of the MP5, MPK, SP5, and SP5K. Each unit is individually function-tested to ensure consistent trigger reset under rapid firing conditions, making it a direct replacement for factory trigger packs with no permanent alterations to the receiver.

Features & Specs

• Two-stage, 3-position forced reset trigger (FRT) for HK MP5, MP5K, SP5, and SP5K platforms; positions include Safe, Semi-Automatic, and Forced Reset (FR) mode
• Ambidextrous safety selector and trigger shoe; left- and right-side paddle release compatible with standard HK trigger housings
• Manufacturer: Rare Breed; Category: Triggers; constructed from 4140 steel with QPQ nitride finish; hammer weight: 4.5 oz; sear engagement: 0.035 inches

The FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K employs Rare Breed’s dual-stage reset cam, which physically forces the hammer forward after each shot in FR mode, enabling rapid follow-up shots without altering the firearm’s cyclic rate. The first stage delivers a 3.5-pound take-up, while the second stage breaks at 4.5 pounds with a tactile reset. The trigger housing is machined from billet 7075-T6 aluminum and includes a captive trigger pin set for tool-less installation. Compatibility extends to all factory and aftermarket HK trigger packs equipped with standard push-pin retention. The unit is ATF-reviewed and classified as a trigger assembly; no tax stamp or NFA registration is required for ownership or use.

Who It’s For

This forced reset trigger is intended for experienced HK platform owners who require a legally compliant, high-cyclic-rate trigger for competitive shooting, training, or range use. The FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is suited for shooters who understand forced reset mechanics and can demonstrate safe, controlled firing in FR mode. It is not recommended for defensive or duty use due to the trigger’s unique reset behavior. Users must be familiar with local, state, and federal laws regarding forced reset triggers and confirm that the device is legal in their jurisdiction before purchase. This product is not compatible with full-auto sear packs, registered lightning links, or any NFA-regulated conversion devices.

Shipping & FFL

This trigger ships directly to your residential or business address via UPS Ground or USPS Priority Mail. No Federal Firearms License (FFL) transfer is required because this product is classified as a firearm component, not a firearm. Rare Breed does not require a background check, dealer transfer, or 4473 form for purchase or delivery. However, customers are solely responsible for verifying that the FRT-RD3 (Ambi) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K complies with all applicable local, state, and federal laws, regulations, and ordinances in their area of residence. Rare Breed and the retailer assume no liability for improper use, installation, or legal consequences arising from ownership or operation of this product. By purchasing, you confirm that you are legally eligible to own a trigger assembly and will not use it in a manner that violates any law. All sales are final.