The FRT-MR3™ (FLAT) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 comes complete with essential parts as described: FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 represents a precision-engineered upgrade for the discerning MR-platform owner. Designed and manufactured by Rare Breed, this trigger system delivers a distinct mechanical advantage for shooters who demand reliability and repeatable performance. As a drop-in forced reset trigger, the FRT-MR3 leverages the MR223 and MR556 operating systems to provide a crisp single-stage pull with a forced-reset function that returns the trigger forward automatically after each shot, enabling rapid follow-up without the complexity of full-automatic fire. This unit is specifically designed for the MR223 and MR556 platforms and is not a universal fit component. Overview The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is a purpose-built replacement trigger that integrates directly into the factory lower receiver. It offers three selectable positions: Safe, Semi-Automatic, and a forced-reset mode. In the forced-reset position, the trigger mechanism utilizes the bolt carrier’s rearward travel to reset the trigger shoe, allowing the shooter to fire as fast as the trigger is released and pulled again. This is not a binary trigger, and it does not modify the firearm’s semi-automatic classification. The flat trigger shoe provides a consistent, parallel finger placement for improved trigger control and a more direct feel during rapid strings of fire. Features & Specs Manufacturer: Rare Breed. Category: Triggers. Precision-machined steel components with a corrosion-resistant finish for long service life in adverse conditions. Three-position selector: Safe, Semi-Automatic, and forced-reset mode. The forced-reset function is mechanically driven by the bolt carrier and does not rely on spring tension for reset. Flat trigger shoe geometry reduces over-travel and provides a consistent trigger pull weight. Single-stage design with a clean, predictable break. Specifications include a trigger pull weight set at the factory to approximately 4.5 pounds, with a short reset and minimal creep. The unit is designed to work with standard MR223 and MR556 bolt carrier groups and does not require modification to the firearm’s upper receiver. Installation is a direct drop-in replacement for the factory trigger group. The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is assembled and tested by Rare Breed prior to shipment. Who It Is For This trigger is intended for experienced shooters who own an HK MR223 or HK MR556 and are looking to increase their rate of fire while maintaining semi-automatic compliance. It is suitable for competition shooters in divisions that allow forced-reset triggers, as well as for enthusiasts who train for rapid target engagement. The flat trigger shoe appeals to shooters who prefer a consistent finger position and a more tactile trigger feel. This product is not recommended for novice shooters or for use in firearms that are not specifically listed as compatible. The FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is a performance component intended for legal, range-based use. Shipping & FFL This product is classified as a firearm component and will ship directly to your doorstep with no FFL transfer required. However, it is your responsibility to verify that this trigger is legal to possess and install in your jurisdiction. Local, state, and federal laws vary, and we do not provide legal advice. By purchasing the FRT-MR3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556, you certify that you are not prohibited from owning firearm parts and that your intended use complies with all applicable laws. We reserve the right to cancel orders that appear to violate state or local restrictions. Standard shipping rates apply, and we do not ship to PO boxes. Installation should be performed by a qualified gunsmith if you are unfamiliar with trigger replacement procedures.

No. This product is a part or accessory and does not require an FFL for purchase or shipping.

While FRT-MR3™ (FLAT) Single-Stage (3-Position) Forced Reset Trigger for the HK MR223 & HK MR556 is legal in most states, always verify your local laws before placing an order. We comply with all state regulations.

In most cases, yes — Glock-compatible frames are designed to accept Glock OEM and compatible magazines. Always confirm fitment in the product details.

That depends on your state’s concealed carry laws. Once properly serialized and registered, carrying may be allowed under state law.

We ship all over the USA within 1–3 business days. You will receive tracking once shipped. Delivery times vary by carrier and region.