Description

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

If you own an HK MP5, MP5K, SP5, or SP5K, you already know the platform demands precision. The FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger from Rare Breed delivers that precision with a mechanical advantage that changes how you interact with your roller-delayed system. This is not a drop-in gimmick; it is a thoughtfully engineered trigger group designed around the SEF (Navy) trigger housing, giving you three distinct positions: safe, semi-auto, and the forced-reset function. We have spent time behind this trigger, and it rewards deliberate, consistent finger discipline with a fast, predictable reset that keeps you on target.

Overview

The FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K is a direct replacement for the standard trigger pack in SEF-style housings. It uses a two-stage pull that breaks cleanly, then mechanically forces the trigger forward after each shot, allowing you to ride the reset without relying on spring tension alone. This design minimizes over-travel and keeps your finger in the optimal position for rapid follow-up shots. Rare Breed built this specifically for HK-pattern firearms, so you get a trigger that fits without modification to your receiver or bolt carrier group.

Features & Specs

• Three-position selector: safe, semi-auto, and forced-reset (FRT) mode. The FRT position engages the mechanical reset system, requiring the trigger to fully reset forward before the next round can fire.
• Two-stage trigger pull: a smooth take-up stage followed by a crisp break. The forced-reset function then pushes the trigger forward, shortening the reset distance compared to standard semi-auto triggers.
• Manufactured by Rare Breed in the USA, using heat-treated steel components and precision-machined internals. Compatible with HK MP5, MP5K, SP5, and SP5K models using SEF (Navy) trigger housings.

The FRT-RD3 (SEF) Two-Stage (3-Position) Forced Reset Trigger for the HK MP5, MP5K, SP5 & SP5K operates on a simple mechanical principle: after the hammer falls, a cam engages the trigger shoe, pushing it forward past the disconnector. This forces you to release forward pressure—not just lift your finger—before the sear can re-engage. The result is a consistent, repeatable cycle that rewards a disciplined trigger pull. Specs include a trigger pull weight of approximately 6-7 pounds (measured at the factory) and a positive safety engagement that blocks the sear in the safe position.

Who It’s For

This trigger is for experienced HK owners who understand the mechanical relationship between trigger manipulation and cyclic rate. If you shoot your MP5 or SP5 regularly and want a trigger that gives you a definitive reset without modifying your firearm’s internals, this is worth serious consideration. It is also suited for collectors and enthusiasts who appreciate the engineering behind forced-reset systems and want a reliable, repeatable trigger for range sessions or competition use. Because the FRT-RD3 retains the three-position selector, it remains practical for standard semi-auto shooting when you do not need the forced-reset function. This is not a trigger for casual plinkers or first-time gun owners—it requires familiarity with your platform and a willingness to practice the technique.

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 does not require an FFL transfer when shipped directly to you in most states. However, it is your responsibility to verify that this trigger is legal to own and install in your jurisdiction. Some states and localities have specific restrictions on forced-reset triggers or binary-type devices. We recommend checking your local laws before ordering. If your state requires shipment to a licensed FFL dealer for compliance, we will gladly accommodate that request. Contact our customer service team if you have questions about your specific situation.