About this product

FRT-RD3™ (AMBI) Two-Stage · 3-Position · Ambidextrous · HK MP5 / MP5K / SP5 / SP5K HK MP5 HK MP5K HK SP5 HK SP5K The FRT-RD3™ (AMBI) brings Rare Breed Triggers’ patented forced reset technology to the iconic HK MP5, MP5K, SP5, and SP5K — with fully ambidextrous controls and a two-stage trigger pull built for precision. Engineered by Rare Breed Triggers , it delivers th Ships to all 50 states. Available nationwide.

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

Overview

The FRT-RD3™ (ambi) two-stage (3-position) forced reset trigger for the HK MP5, MP5K, SP5 & SP5K represents a precision-engineered upgrade for roller-delayed blowback platforms. Manufactured by Rare Breed, this drop-in trigger assembly delivers a forced-reset operating cycle that combines the tactile feedback of a two-stage trigger with a third, forced-reset position. Designed specifically for the HK MP5, MP5K, SP5, and SP5K, the FRT-RD3™ maintains factory safety compliance while offering shooters a distinct mechanical advantage in rapid follow-up shot placement. Each unit is built to MIL-spec tolerances and uses heat-treated steel components for sustained reliability under high-round-count conditions.

Features & Specs

• True two-stage trigger with a 3-position selector: Safe, Semi-Automatic, and Forced-Reset. The forced-reset position utilizes the bolt carrier’s forward motion to mechanically reset the trigger sear, enabling a faster cyclic rate without modification to the host firearm’s bolt or carrier group.
• Ambidextrous safety selector included; compatible with HK MP5, MP5K, SP5, and SP5K lower receivers. No permanent alteration to the firearm is required for installation. The trigger housing is precision-machined from 7075-T6 aluminum with a hard-coat anodized finish.
• Pull weight: factory-set at approximately 4.5 to 5.5 pounds on the two-stage semi-automatic position. The forced-reset position operates with a consistent, repeatable trigger return that reduces shooter-induced timing error. Includes all necessary springs, pins, and detents.

Who It’s For

This FRT-RD3™ (ambi) two-stage (3-position) forced reset trigger for the HK MP5, MP5K, SP5 & SP5K is intended for experienced shooters who demand enhanced trigger control in a legal, drop-in package. It is suitable for competitive shooters in USPSA, PCC divisions, or outlaw 3-gun matches where forced-reset triggers are permitted. It also serves trained enthusiasts who want faster split times on steel or paper while maintaining a positive, two-stage feel for precision shots. Law enforcement and security professionals who use HK-platform PDWs may also find the forced-reset capability advantageous in controlled training environments. This product is not recommended for novice shooters unfamiliar with forced-reset trigger mechanics.

Shipping & FFL

This product ships directly to your doorstep. No FFL transfer is required because the FRT-RD3™ trigger assembly is a firearm component, not a complete firearm or receiver. However, you must be at least 18 years of age to purchase. It is your responsibility to verify that this trigger is legal to own and install in your jurisdiction. Rare Breed triggers comply with current federal firearms regulations as of the date of manufacture. Some states and localities may have additional restrictions regarding forced-reset triggers. By purchasing, you confirm that you are not prohibited from possessing firearm parts. We recommend consulting with a local firearms attorney if you have any legal questions prior to ordering.