Davidson Defense AR-15 Ambidextrous Bolt Catch Lower Build Kit, Rare Breed FRT-15L3, Carbine MIL-SPEC 6 Position Buttstock

Davidson Defense AR-15 Ambidextrous Bolt Catch Lower Build Kit, Rare Breed FRT-15L3, Carbine MIL-SPEC 6 Position Buttstock

A complete lower build kit built around the Rare Breed FRT-15L3 forced reset trigger, a forged 7075-T6 lower receiver with ambidextrous bolt catch, and a carbine buffer system with adjustable 6 position buttstock. This kit delivers rapid follow-up capability in a drop-in package designed for builders who want forced reset functionality with ambidextrous controls.

Key Features

• Rare Breed FRT-15L3 forced reset trigger with safe, semi, and forced reset modes, constructed from 7075 anodized aluminum and heat-treated 4140 steel for duty-grade reliability
• Forged 7075-T6 aluminum lower receiver with black hardcoat anodized finish and milled ambidextrous bolt catch slot for enhanced control from either side
• Ambidextrous bolt catch and 3 position ambidextrous safety selector for improved manipulation regardless of shooting hand preference
• Mil-spec heavy-duty 6 position carbine buffer tube, AR-15 H3 carbine buffer weighing 5.5 oz, and carbine recoil spring for reliable cycling with a range of upper configurations
• Adjustable carbine buttstock in 6061-T6 aluminum with integrated sling loop for length of pull customization and carry options
• Complete lower parts kit with phosphate finished metal receiver end plate, black castle nut, and all required pins and springs for full functionality

Perfect For

• Builders seeking forced reset trigger technology in a complete lower build kit format
• Shooters who value ambidextrous controls for bolt catch and safety selector operation
• Left-handed shooters or those training for ambidextrous weapon handling
• AR-15 platform builds requiring a serialized lower receiver with all components to complete the lower assembly
• Experienced builders familiar with forced reset trigger systems and current legal requirements

Forced Reset Trigger Technology

The FRT-15L3 uses forced reset technology to eliminate manual trigger reset between shots, allowing significantly faster firing rates while maintaining one trigger pull per round. When the bolt carrier moves rearward after firing, the hammer cocks and contacts the trigger, forcing it to reset. A locking lever prevents the trigger from being pressed again until the bolt cycles. This creates faster follow-up shots than standard semi-automatic triggers without crossing into full-automatic operation. The three-position selector allows safe, traditional semi-automatic, and forced reset modes depending on the shooting application.

Ambidextrous Control Integration

The lower receiver features a milled ambidextrous bolt catch slot paired with an ambidextrous bolt catch kit, providing bolt lock and release capability from either side of the receiver. The 3 position ambidextrous safety selector completes the control package, eliminating the need to shift grip or break shooting position when operating the firearm from either shoulder. These features improve manipulation speed and flexibility for tactical applications, competition shooting, or training scenarios requiring weapon transitions.

Carbine Buffer System with H3 Buffer

The mil-spec heavy-duty 6 position carbine buffer tube pairs with an AR-15 H3 carbine buffer weighing 5.5 oz and a carbine recoil spring to manage bolt carrier recoil and cycling. The H3 buffer provides additional weight compared to standard carbine buffers, reducing felt recoil and slowing bolt carrier velocity for smoother cycling. The 6 position tube allows length of pull adjustment via the adjustable carbine buttstock, accommodating different shooter sizes, body armor, or shooting positions.

Serialized Lower Receiver Platform

The forged 7075-T6 aluminum lower receiver is serialized and serves as the regulated component of the AR-15 platform. Black hardcoat anodized finish provides corrosion resistance and durability. The receiver accepts all mil-spec AR-15 upper assemblies and components, providing a foundation for complete builds. This kit includes all lower parts necessary to complete the lower assembly.

This kit includes the serialized lower receiver and all components to complete the lower build. Follow safe handling and manufacturer instructions. Ensure compliance with all applicable laws. Verify current legal status of forced reset trigger systems in your jurisdiction before purchase or installation. Trigger guard style may vary depending on current inventory.