AR15 6-Position Carbine MIL-SPEC Enhanced Buffer Tube Assembly Kit

The CMC Triggers AR15 6-Position Carbine MIL-SPEC Enhanced Buffer Tube Assembly Kit is a complete receiver extension system engineered to MIL-SPEC dimensions for direct compatibility with standard AR-15 lower receivers and mil-spec stocks. This buffer tube assembly kit delivers the core component infrastructure that operators and builders depend on for repeatable, field-proven AR platform configurations.

The buffer tube is machined from 7075 T6 aluminum and finished with Type III Class II hard coat anodization—a military-grade surface treatment that provides superior corrosion resistance in harsh environments. Six positions allow adjustment of buttstock length of pull to accommodate different shooting positions, gear configurations, and operator body geometry. Through-drainage holes machined into the tube design evacuate standing water in submerged or wet-condition scenarios, critical for amphibious operations or maritime environments where corrosion typically degrades standard components. The castle nut and quick-detach end plate are forged from high carbon steel, heat-treated for structural integrity, and finished to specification for secure, rattle-free assembly.

This kit serves operators building or refreshing AR-15 carbines for patrol duty, training, or tactical applications where precision receiver extension geometry is non-negotiable. Law enforcement agencies, military units, and civilian shooters standardizing on MIL-SPEC components rely on buffer tube assemblies to maintain interchangeability across multiple platforms and ensure stocks and training equipment remain consistent. The 6-position adjustment system accommodates both slick-side carbines and modern collapsible stock mounting without requiring additional adapter hardware.

MIL-SPEC buffer tube assemblies remain the baseline standard for AR platform modularity. CMC's enhanced finish and drainage design distinguish this kit for users operating in corrosive or moisture-heavy conditions where component longevity directly impacts mission reliability.