Heavy-Duty 6-Position Buffer Tube DPMS AR-15 Rifle Lower Build Kit, Straight Shoe

Heavy-Duty 6-Position Buffer Tube DPMS AR-15 Lower Build Kit, Straight Shoe

This is a complete AR-15 lower build kit built around a DPMS forged 7075-T6 aluminum receiver with mil-spec heavy-duty components throughout. It includes a Davidson Defense Match Grade 31-piece lower parts kit with a 3.5-pound straight trigger, mil-spec carbine buffer system with 6-position adjustment, and all hardware needed to complete the lower receiver. The receiver itself is forged aluminum with Type III hard coat anodizing and multi-caliber markings, meaning it's compatible with standard AR-15 upper assemblies regardless of caliber. This kit gives you a solid foundation for any AR-15 build without requiring you to source individual components.

Key Features

• DPMS forged 7075-T6 aluminum lower receiver with MIL-A-8625 Type III Class 2 hard coat anodize
• Davidson Defense Match Grade 31-piece lower parts kit with single-stage trigger
• Straight skeletonized trigger shoe with 3.5-pound pull weight
• Heavy-duty mil-spec 6-position carbine buffer tube with standard 3-ounce buffer
• Mil-spec end plate, castle nut, and recoil spring included
• Mil-spec A2 grip in black
• Standard AR-15 magazine well and buffer extension interface for universal compatibility

Perfect For

• First-time AR-15 builders looking for a complete lower assembly solution
• Shooters building multiple rifles who need matched components
• Those prioritizing durability and mil-spec compliance over custom features
• Builders who want to pair this lower with any standard AR-15 upper assembly

Heavy-Duty Construction and Forged Aluminum

The DPMS DA-15 lower receiver is forged from 7075-T6 aluminum, a high-strength alloy that resists wear and maintains dimensional stability through extended use. The Type III hard coat anodize finish provides corrosion resistance and durability in field conditions. Multi-caliber markings mean this receiver works with any standard AR-15 upper in 5.56, .223, 6.5 Grendel, .300 Blackout, or other common AR-15 calibers without modification.

Davidson Defense Match Grade Lower Parts Kit

The included 31-piece lower parts kit is manufactured to match-grade tolerances, meaning tighter tolerances and more consistent fit than standard mil-spec parts. This translates to smoother operation and less rattle between components. The single-stage trigger breaks cleanly at 3.5 pounds with a straight shoe design for direct trigger control. All trigger components are steel with black oxide finish for durability.

6-Position Buffer System for Adjustment

The heavy-duty mil-spec carbine buffer tube offers six positions of length adjustment, allowing you to tune the setup for different stocks or braces based on your preferences. The standard 3-ounce carbine buffer and carbine-length recoil spring are included. This setup is compatible with any mil-spec carbine-length upper assembly and cycles reliably across standard AR-15 ammunition types.

Complete Hardware Package

The kit includes the US Tactical mil-spec receiver end plate and AR-15 carbine castle nut, plus all pins and springs required for lower receiver assembly. The mil-spec A2 grip is included in black. Everything needed to complete the lower receiver is present except the serialized lower receiver itself, which is already included as the DPMS DA-15.

Lower receiver is included and serialized. Stock or brace not included. Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.