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FRT MR3™ Forced Reset Trigger for the HK MR223 & HK MR556

Original price was: $499.00.Current price is: $459.50.

Contents:

1 x FRT-MR3 Trigger
2 x Anti-Walk Pins
4 x Anti-Walk Pin Screws
1 x A1 Selector Drum
1 x A4 Selector Drum
2 x Se

SKU: RB-FRT-MR3 Categories: Trigger Parts, Triggers, Wholesale

Here’s a clean, factual product description for the FRT MR3™:

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The FRT MR3™ Forced Reset Trigger delivers rapid, controlled fire for HK MR223 and MR556 platforms while maintaining full legal compliance. Engineered by Rare Breed Triggers, this drop-in system combines precision machining with a unique forced-reset mechanism for faster follow-up shots without compromising reliability.

What you get

FRT MR3™ trigger assembly with forced reset mechanism
3-position ambidextrous safety selector (Safe/Semi/FRT)
Anti-walk pins for secure installation
CNC-machined components with hardened contact surfaces
Tool-free reset adjustment via set screw
100% made in the USA

Build and finish

The FRT MR3™ is machined from 4140 chromoly steel with case-hardened engagement surfaces, rated for 50,000+ cycles. The trigger shoe features a flat face design with textured contact points for consistent finger placement. All springs are heat-treated music wire, with the disconnector and hammer interfaces polished to reduce friction.

Unlike binary triggers, the forced reset system maintains a single-shot-per-pull operation while eliminating the need to fully release the trigger between shots. The mechanism uses a patented roller-bearing reset that functions independently of bolt carrier speed, ensuring consistent performance across ammunition types.

Compatible platforms

HK MR223 (all generations)
HK MR556 (including A1 variants)
Compatible with most aftermarket HK trigger housings

Installation notes

Installs like a standard HK trigger group using included anti-walk pins. No gunsmithing required, but function testing with dummy rounds is recommended before live fire. The safety selector detent may require slight fitting depending on your lower receiver’s tolerances.

For shooters who demand responsive triggers without compromising the ruggedness of their HK platform, the FRT MR3™ offers a purpose-built solution. Its forced reset operation provides tangible performance gains for tactical training and competitive use while maintaining the reliability expected from Rare Breed Triggers.

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FFL Transfer & Firearms Laws for FRT MR3™ Forced Reset Trigger for the HK MR223 & HK MR556

All firearms, including the FRT MR3™ Forced Reset Trigger for the HK MR223 & HK MR556, must be shipped to a licensed Federal Firearms License (FFL) dealer. You will be required to complete a background check and any necessary paperwork before taking possession.

How It Works

Place your order online.
Provide your preferred FFL dealer information.
We ship the firearm directly to your FFL.
You complete the background check and pickup at the FFL.

Legal Compliance

We comply with all federal and state firearm laws. It is your responsibility to ensure the FRT MR3™ Forced Reset Trigger for the HK MR223 & HK MR556 is legal in your state. Some states may have restrictions on certain firearm models or features.

Helpful Resources

Need assistance? Contact our Miami store for help with FFL transfers and firearm compliance.

Frequently Asked Questions About This Product

Why buy FRT MR3™ Forced Reset Trigger for the HK MR223 & HK MR556 from Miami Shooters Supply?

We’re a trusted firearms dealer offering fast shipping, competitive pricing, and 100% compliance with U.S. federal firearm laws. All orders ship from our licensed facility with full tracking and expert customer service.

Where can I buy FRT MR3™ Forced Reset Trigger for the HK MR223 & HK MR556?

You can purchase this item directly on our website and have it shipped to your local FFL dealer. You can also visit us in-store in Miami, Florida.

Is FRT MR3™ Forced Reset Trigger for the HK MR223 & HK MR556 available now?

Availability is shown live on this page. If the “Add to Cart” button is visible, this item is currently in stock and ready to ship.

What category does this product belong to?

This product is listed under: Trigger Parts, Triggers, Wholesale.

What tags or features does this product have?

Key features and tags for this product include: .

Is this product legal in my state?

It is your responsibility to ensure this item is legal in your state or locality. We ship only to valid FFL dealers in compliance with U.S. laws. Always check your local regulations.

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FFL Transfer & Firearms Laws

All firearms, including the FRT MR3™ Forced Reset Trigger for the HK MR223 & HK MR556, must be shipped to a licensed Federal Firearms License (FFL) dealer. A background check and any required local paperwork must be completed before you can take possession.

How It Works

Place your order online.
Send us your preferred local FFL dealer info.
We ship the firearm to your FFL after verification.
Complete background check and pick up from your dealer.

Legal Compliance

We comply with all U.S. firearm laws. It is your responsibility to ensure the FRT MR3™ Forced Reset Trigger for the HK MR223 & HK MR556 is legal in your state. Some states (e.g. CA, NY, NJ) have restrictions on magazine size or certain features.