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

The FRT-RD3 (ambi) two-stage (3-position) forced reset trigger for the HK MP5, MP5K, SP5 & SP5K is a precision-engineered drop-in component from Rare Breed. Designed specifically for the roller-delayed HK platform, this trigger delivers a distinct forced-reset cycling mechanism that resets the trigger forward under recoil, enabling rapid follow-up shots while remaining a legal semi-automatic fire control system. Built for shooters who demand reliability and repeatable performance, the FRT-RD3 (ambi) two-stage (3-position) forced reset trigger for the HK MP5, MP5K, SP5 & SP5K offers an ambidextrous safety selector and a three-position selector configuration for intuitive operation.

Overview

The FRT-RD3 (ambi) two-stage (3-position) forced reset trigger for the HK MP5, MP5K, SP5 & SP5K operates on a two-stage pull with a defined wall, followed by a forced-reset function that mechanically returns the trigger to the forward position after each shot. This design provides a tactile reset point that aids in controlled cyclic rate management. The three-position selector includes safe, semi-automatic, and a forced-reset mode, giving the shooter a clear selection of fire modes without ambiguity. Rare Breed manufactures this trigger to tight tolerances, ensuring compatibility with both full-size MP5 and SP5 models as well as the compact MP5K and SP5K variants. This FRT-RD3 (ambi) two-stage (3-position) forced reset trigger for the HK MP5, MP5K, SP5 & SP5K is a direct drop-in replacement requiring no permanent modification to the host firearm.

Features & Specs

• Three-Position Selector: Safe, semi-automatic, and forced-reset mode. The forced-reset position engages the trigger’s mechanical reset function, allowing the shooter to maintain a consistent finger position while the trigger resets forward under recoil. The ambidextrous selector accommodates both right- and left-handed shooters.
• Two-Stage Pull: A defined first stage take-up, followed by a crisp second stage wall. The forced-reset function returns the trigger forward to the wall after each discharge, providing a repeatable break point for each shot. Pull weight is factory-set to approximately 4.5 to 5.5 pounds in semi-automatic mode.
• Drop-In Installation: No gunsmithing required. This FRT-RD3 (ambi) two-stage (3-position) forced reset trigger for the HK MP5, MP5K, SP5 & SP5K installs directly into factory trigger housings. Included with the unit are all necessary pins and springs for a complete installation. Compatible with standard MP5, MP5K, SP5, and SP5K lower receivers.
• Manufacturer: Rare Breed. Category: Triggers. Material: Heat-treated steel and hardened aluminum components. Finish: Mil-spec anodized and parkerized for corrosion resistance.

Who It’s For

This trigger is for experienced shooters and competitive marksmen who own an HK MP5, MP5K, SP5, or SP5K and want a forced-reset trigger system that offers a distinct mechanical advantage for rapid fire while maintaining legal semi-automatic functionality. It is suitable for range use, training drills, and competition where split times matter. The ambidextrous controls make it a strong choice for left-handed shooters. This product is not intended for duty or self-defense applications where a standard single-stage trigger may be preferred. The FRT-RD3 (ambi) two-stage (3-position) forced reset trigger for the HK MP5, MP5K, SP5 & SP5K is designed for those who understand the mechanics of forced-reset triggers and want a drop-in upgrade for their roller-delayed firearm.

Shipping & FFL

This FRT-RD3 (ambi) two-stage (3-position) forced reset trigger for the HK MP5, MP5K, SP5 & SP5K is a firearm component and ships directly to your address. No Federal Firearms License (FFL) transfer is required for this trigger unit. However, you must be at least 18 years of age to purchase. Check all local, state, and federal laws regarding the ownership and use of forced-reset triggers before ordering. Rare Breed triggers are legal in most states, but certain jurisdictions have specific restrictions. It is your responsibility to ensure compliance with all applicable laws. We ship to all 50 states excluding any locations where this product is prohibited by law. Standard shipping rates apply; expedited options are available at checkout.