Description

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

If you run an HK roller-delayed platform, you know the trigger is where the rifle either shines or stays in the safe. The FRT-RD3 (ambi) two-stage (3-position) forced reset trigger for the HK MP5, MP5K, SP5 & SP5K brings a whole new level of control and speed to your setup. Rare Breed took the proven forced-reset concept and dialed it in specifically for these iconic firearms, giving you a trigger that resets forward under spring tension while you keep pressure on the trigger shoe. It is not a binary trigger and it is not a full-auto device, but it does deliver a rapid, repeatable shot cycle that feels intuitive once you run a few mags through it. Whether you are working on a clone build or a factory SP5, this trigger drops in with minimal fuss and changes how you think about split times.

Overview

The FRT-RD3 builds on Rare Breed’s reputation for pushing trigger innovation while staying inside legal boundaries. This is an ambidextrous, two-stage design with three selectable positions: safe, semi-automatic, and forced-reset mode. In forced-reset mode, the trigger resets forward automatically as the bolt cycles, so you only need to manage the release and re-application of pressure rather than fully lifting your finger. The result is a faster cyclic rate without sacrificing the positive break and tactile feedback you expect from a quality two-stage trigger. It is built specifically for the HK MP5, MP5K, SP5, and SP5K platforms, so you get a proper fit without modification to your lower.

Features & Specs

• Ambidextrous safety selector and trigger shoe: left and right-handed shooters get the same crisp performance without swapping parts.
• Two-stage design with 3-position selector: safe, semi, and forced-reset mode give you flexibility at the range or in training.
• Drop-in installation for HK MP5, MP5K, SP5, and SP5K lowers: no permanent modification required, just standard pins and springs.

The FRT-RD3 (ambi) two-stage (3-position) forced reset trigger for the HK MP5, MP5K, SP5 & SP5K uses precision-machined steel components and a nickel-Teflon coated sear for consistent performance round after round. The trigger pull weight in forced-reset mode is approximately 5-6 pounds with a clean break and short reset. Rare Breed includes all necessary springs and pins, plus a detailed installation guide. This trigger is designed for use with factory-spec bolt carriers and does not require any aftermarket bolt modifications.

Who It’s For

This trigger is for the shooter who wants to push the speed envelope with their MP5 or SP5 without chasing a giggle switch. It is ideal for competitive shooters in PCC divisions, for high-volume trainers who want to reduce fatigue during long range sessions, and for collectors who appreciate fine engineering in their roller-delayed builds. The FRT-RD3 (ambi) two-stage (3-position) forced reset trigger for the HK MP5, MP5K, SP5 & SP5K also appeals to left-handed shooters who have struggled to find an ambi trigger that actually works with the HK lower geometry. If you already own multiple HK pattern rifles, this trigger moves between them easily as long as you stay within the MP5 family. It is not meant for first-time builders or casual plinkers, but if you know your way around a trigger pack, you will be up and running in under thirty minutes.

• Experienced HK owners looking to maximize split times without full-auto parts.
• Left-handed shooters who need an ambi trigger that works with the HK pack layout.
• Competitors running PCC divisions that allow forced-reset triggers.

Shipping & FFL

Because the FRT-RD3 (ambi) two-stage (3-position) forced reset trigger for the HK MP5, MP5K, SP5 & SP5K is a firearm trigger assembly and not a complete firearm, it ships directly to your door with no FFL transfer required in most states. However, you are responsible for knowing and complying with all local, state, and federal laws regarding trigger ownership and installation. Some states and municipalities have restrictions on forced-reset triggers, so please verify legality before ordering. Rare Breed and our retailer do not accept returns on installed triggers, and all sales are final once the package leaves our warehouse. Standard shipping rates apply, and we ship within two business days of cleared payment. If you have questions about your specific jurisdiction, contact us before placing your order.

• No FFL transfer required for most customers, but check your local laws first.
• All sales final: no returns or exchanges on installed trigger components.
• Ships within 2 business days via insured carrier with tracking.