DTT AR-15 Rifle Lower Build Kit, Rare Breed FRT-15L3 Flat Trigger, BCM Gunfighter Black SOPMOD Mod 1 Stock

DTT AR-15 Rifle Lower Build Kit - Rare Breed FRT-15L3 Flat Trigger, BCM Gunfighter SOPMOD Mod 1 Stock

The DTT AR-15 Rifle Lower Build Kit is a lower completion package built around a 7075-T6 aluminum lower receiver with a Type III hardcoat anodized black finish. It includes the Rare Breed FRT-15L3 flat forced reset trigger with anti-walk trigger pins and a 3-position ambidextrous safety selector, the BCM Gunfighter SOPMOD Mod 1 stock in black, a KAK Industry AR-15 Lite lower parts kit with Mil-Spec A2 grip, a Mil-Spec heavy-duty 6-position carbine buffer tube, an H3 sound mitigation buffer at 5.6 oz, a US Tactical AR-15 M16 Mil-Spec receiver end plate in phosphate finish, and an AR-15 carbine castle nut. Upper receiver and bolt carrier group are not included.

Key Features

• 7075-T6 aluminum lower receiver, Type III hardcoat anodized black
• Low shelf trigger pocket with M16 cut
• Ambidextrous pictogram selector markings, Safe, Semi, Full Auto, engraved both sides
• Standard AR-15 and STANAG magazine compatibility
• Rare Breed FRT-15L3 flat forced reset trigger, 7075 anodized aluminum and heat-treated 4140 steel
• Ambidextrous 3-position safety selector
• Anti-walk trigger pins included
• Full-auto compatible BCG required
• KAK Industry AR-15 Lite lower parts kit
• Mil-Spec A2 grip, black
• BCM Gunfighter SOPMOD Mod 1 stock, black polymer
• Mil-Spec heavy-duty 6-position carbine buffer tube
• H3 sound mitigation buffer, 5.6 oz
• US Tactical AR-15 M16 Mil-Spec receiver end plate, phosphate finish
• AR-15 carbine castle nut
• Upper receiver not included
• Bolt carrier group not included

Perfect For

• AR-15 builders sourcing a complete lower with a flat forced reset trigger and premium stock
• Builders pairing this kit with an existing AR-15 upper assembly
• Shooters who want ambidextrous controls and a BCM stock in a single lower build package

Rare Breed FRT-15L3 Flat Trigger

The Rare Breed FRT-15L3 is a drop-in flat forced reset trigger built from 7075 anodized aluminum and heat-treated 4140 steel. It operates in Safe, Semi, and Forced Reset modes with an ambidextrous 3-position safety selector. Anti-walk trigger pins are included as part of the trigger hardware. A full-auto compatible bolt carrier group is required for proper function.

BCM Gunfighter SOPMOD Mod 1 Stock

The BCM Gunfighter SOPMOD Mod 1 stock is a black polymer adjustable carbine stock compatible with Mil-Spec receiver extensions. It features an enhanced SOPMOD-style cheekweld, dual ambidextrous QD sling sockets, and VBOST sling tab compatibility. An internal storage compartment, integrated rubber buttpad, and snag-free low-profile construction round out the stock.

Lower Receiver and Parts Kit

The lower receiver is machined from 7075-T6 aluminum with a Type III hardcoat anodized black finish. It features a low shelf trigger pocket with M16 cut and ambidextrous engraved pictogram selector markings on both sides. The KAK Industry AR-15 Lite lower parts kit covers the internal lower receiver components and includes a Mil-Spec A2 grip in black.

Buffer System and Rear Hardware

The buffer system consists of a Mil-Spec heavy-duty 6-position carbine buffer tube and an H3 sound mitigation buffer at 5.6 oz. The rear hardware includes a US Tactical AR-15 M16 Mil-Spec receiver end plate in phosphate finish and an AR-15 carbine castle nut. These components cover the core rear support hardware for the lower side of the build.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Upper receiver not included. Bolt carrier group not included. A full-auto compatible bolt carrier group is required for proper trigger function.