FRT-15L3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the AR-15

Designed and manufactured by Rare Breed, the FRT-15L3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the AR-15 represents a precision-engineered evolution in trigger system technology. This unit operates on a forced-reset mechanical principle, requiring the shooter to maintain forward pressure on the trigger shoe after each discharge to reset the sear. The system offers three distinct selector positions: Safe, Semi-Automatic, and Forced Reset. Constructed from heat-treated, mil-spec steel components with a flat-faced trigger shoe, this unit is built for shooters who demand consistent lock time and a defined reset interface. The FRT-15L3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the AR-15 is a drop-in assembly compatible with standard AR-15 lower receivers using a mil-spec trigger pocket.

Overview

The FRT-15L3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the AR-15 is a mechanical trigger system that uses a spring-driven reset mechanism to return the trigger shoe to its forward position after each shot. Unlike binary triggers or standard semi-automatic triggers, the forced reset design relies on the cyclic action of the bolt carrier to push the trigger forward, requiring the shooter to release and re-engage the trigger for each subsequent round. This system provides a consistent, repeatable trigger pull weight across all firing modes. The flat trigger shoe reduces finger slip and provides a wider contact surface for more consistent trigger placement. Rare Breed manufactures this unit entirely in the United States using domestic-sourced materials.

Features & Specs

The FRT-15L3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the AR-15 incorporates specific design characteristics that differentiate it from standard drop-in trigger packs. The following specifications define this unit:

• Trigger pull weight: factory-set at 4.5 pounds (+/- 0.5 pounds) across all three selector positions, measured from the center of the trigger shoe
• Three-position selector: Safe (blocked), Semi-Automatic (standard single-stage operation), and Forced Reset (mechanical reset via bolt carrier movement)
• Flat trigger shoe: 0.500-inch width, serrated front face with 30-degree radius edges; manufactured from 4140 steel with nitride finish
• Drop-in cassette design: includes pre-instcluded hammer, trigger, disconnector, and sear engagement surfaces; requires no fitting or trigger guard modification
• Housing dimensions: 2.750 inches long by 1.125 inches wide by 0.875 inches high; uses standard 0.154-inch trigger and hammer pins

Additional technical characteristics include:

• Hammer spring weight: 28 pounds (standard mil-spec equivalent) for reliable primer ignition across all ammunition types
• Sear engagement angle: 85 degrees on the hammer catch surface; secondary sear surface at 92 degrees for consistent disconnector timing
• Operating temperature range: -20 degrees Fahrenheit to 160 degrees Fahrenheit; tested to MIL-STD-810G thermal cycling standards
• Material specifications: all internal components are machined from 8620 alloy steel, case-hardened to 58-62 HRC, with manganese phosphate finish on non-stainless components
• Weight: 3.2 ounces complete assembly; includes all springs, pins, and housing

Who It’s For

This trigger system is designed for experienced AR-15 builders and shooters who understand mechanical trigger operation and are seeking a non-standard trigger interface. The FRT-15L3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the AR-15 requires the shooter to learn a specific trigger manipulation technique: after each shot, the shooter must release pressure on the trigger to allow the forced reset mechanism to return the trigger shoe forward. This system is not recommended for first-time AR-15 builders, competition shooters requiring consistent semi-automatic fire, or users who prefer two-stage triggers. It is appropriate for range use, recreational shooting, and mechanical experimentation where the shooter understands the operational parameters of forced reset systems. Users should verify compatibility with their specific lower receiver, as certain ambidextrous safety selectors or aftermarket grip configurations may interfere with the cassette housing.

Shipping & FFL

This product is classified as a firearm component and ships directly to the customer’s address. No Federal Firearms License (FFL) transfer is required for this item as it is not a complete firearm receiver or frame. However, state and local laws regarding trigger systems with forced reset mechanisms vary significantly. It is the buyer’s sole responsibility to verify that the FRT-15L3 (Flat) Single-Stage (3-Position) Forced Reset Trigger for the AR-15 is legal to own, possess, and install in their jurisdiction before placing an order. Some states, including but not limited to California, Connecticut, Hawaii, Maryland, Massachusetts, New Jersey, New York, and Washington, have enacted restrictions or prohibitions on forced reset triggers. Rare Breed and this retailer do not provide legal advice. By purchasing this item, you affirm that you are in compliance with all applicable federal, state, and local laws. Standard shipping rates apply; expedited shipping is available at checkout. Orders typically ship within 5-7 business days following payment verification.