DTT FDE AR-15 Rifle Lower Build Kit, Rare Breed FRT-15L3 Flat Trigger, Heavy-Duty Carbine 6-Position Buffer Tube

Delta Team Tactical DTT FDE AR-15 Lower Build Kit, Rare Breed FRT-15L3 Flat Trigger, Mil-Spec Heavy-Duty 6-Position Carbine Buffer Tube

The Delta Team Tactical DTT FDE AR-15 Lower Build Kit is a lower completion package built around a forged 7075-T6 aluminum lower receiver with a Cerakote finish in Flat Dark Earth. The receiver features a low shelf trigger pocket with M16 cut and ambidextrous pictogram selector markings engraved on both sides in Safe, Semi, and Full Auto positions. The kit includes a complete lower parts kit with a Rare Breed FRT-15L3 Flat forced reset trigger in place of the standard fire control group, along with a 3-position ambidextrous safety selector and a Mil-Spec A2 grip in black. The Rare Breed FRT-15L3 Flat is a drop-in forced reset trigger with a flat trigger profile, constructed from 7075 anodized aluminum and heat-treated 4140 steel, and includes anti-walk trigger pins. A full-auto compatible bolt carrier group is required for proper function and is not included. The buffer system consists of a Mil-Spec heavy-duty 6-position carbine buffer tube in 6061-T6 aluminum and a Sound Mitigation Buffer H3 at 5.6 oz, which integrates the buffer and recoil spring function into a single self-contained unit. A Mil-Spec metal receiver end plate and a notched steel castle nut in phosphate finish round out the rear hardware.

Key Features

• Forged 7075-T6 aluminum lower receiver, Cerakote FDE finish
• Low shelf trigger pocket, M16 cut
• Ambidextrous pictogram selector markings, Safe, Semi, Full Auto, engraved both sides
• Standard AR-15 and STANAG magazine compatible
• Complete lower parts kit
• Rare Breed FRT-15L3 Flat forced reset trigger, flat profile, 7075 anodized aluminum and heat-treated 4140 steel, anti-walk trigger pins, 3-position Safe, Semi, Forced Reset
• 3-position ambidextrous safety selector
• Mil-Spec A2 grip, black
• Mil-Spec heavy-duty 6-position carbine buffer tube, 6061-T6 aluminum, black
• Sound Mitigation Buffer H3, 5.6 oz, integrated buffer and recoil spring system
• Mil-Spec metal receiver end plate
• Notched steel castle nut, phosphate finish
• Full-auto compatible bolt carrier group required, not included

Perfect For

• AR-15 builders sourcing a complete FDE lower build kit with a Rare Breed FRT-15L3 Flat forced reset trigger already included
• Shooters building a competitive or training-focused AR-15 who prefer a flat trigger profile and want the trigger, ambidextrous safety selector, and buffer system covered in one lower kit
• Builders who want the Sound Mitigation Buffer H3 self-contained buffer system paired with a flat forced reset trigger without sourcing components separately

DTT FDE Lower Receiver

The forged 7075-T6 aluminum lower receiver carries a Cerakote finish in Flat Dark Earth. It features a low shelf trigger pocket with M16 cut and ambidextrous pictogram selector markings engraved on both sides, covering Safe, Semi, and Full Auto positions. The receiver is compatible with standard AR-15 and STANAG magazines.

Rare Breed FRT-15L3 Flat Forced Reset Trigger

The Rare Breed FRT-15L3 Flat is a drop-in forced reset trigger with a flat trigger profile, constructed from 7075 anodized aluminum and heat-treated 4140 steel. It features a 3-position selector covering Safe, Semi, and Forced Reset, and includes anti-walk trigger pins. The forced reset system mechanically resets the trigger after each shot. A full-auto compatible bolt carrier group is required for proper function and is not included with this kit.

Buffer System and Rear Hardware

The buffer system includes a Mil-Spec heavy-duty 6-position carbine buffer tube in 6061-T6 aluminum and a Sound Mitigation Buffer H3 at 5.6 oz. The Sound Mitigation Buffer H3 integrates the buffer and recoil spring function into a single self-contained unit. The Mil-Spec metal receiver end plate and notched steel castle nut in phosphate finish complete the rear hardware included with this kit.

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