L&S Defense ARCBT-BLK 7075-T6 Aluminum Mil-Spec Buffer Tube

The L&S Defense ARCBT-BLK buffer tube delivers enhanced durability and precision through its 7075-T6 aluminum construction, providing a significant upgrade over standard 6061 aluminum tubes. This mil-spec diameter buffer tube maintains exact dimensional tolerances required for reliable cycling in AR-15 platforms.

What Makes This Different

The 7075-T6 aluminum alloy construction offers 50% greater tensile strength compared to standard 6061 aluminum buffer tubes. This aerospace-grade material resists thread wear and dimensional changes under stress, maintaining consistent lockup with castle nuts and end plates. The precision machining ensures proper buffer weight travel and consistent bolt carrier group timing.

Key Features

• 7075-T6 aluminum construction for maximum strength and durability
• Mil-spec diameter threading compatible with standard AR-15 components
• Black anodized finish provides corrosion resistance and low visibility
• Precision-machined threads for secure castle nut engagement
• Standard carbine length accommodates all mil-spec buffer weights
• Six position indexing holes for adjustable stock compatibility
• Proper internal diameter for smooth buffer and spring operation

Field performance remains consistent across temperature extremes and high round counts. The enhanced material properties prevent the thread deformation and wear patterns common with softer aluminum alloys. Competition shooters and duty users benefit from the dimensional stability that maintains zero retention and consistent cycling reliability.

Technical Specs

• Material: 7075-T6 aluminum alloy
• Finish: Type III hard coat anodizing, black
• Threading: Standard mil-spec 1.148" x 16 TPI
• Length: Standard carbine buffer tube dimensions
• Weight: Approximately 4.2 ounces
• Compatibility: All mil-spec AR-15 lower receivers
• Position holes: Six standard spacing for adjustable stocks
• Country of origin: USA manufactured

This buffer tube represents the engineering standard for builders who prioritize component longevity and mechanical precision. The 7075-T6 specification ensures this tube will outlast multiple barrel and bolt carrier group replacements while maintaining factory-fresh tolerances.