NcSTAR Buffer Tube Kit for AR-15 – Mil-Spec, 6 Position, Includes Castle Nut (VG137)

• Mil spec buffer tube includes castle nut for AR-15 stock mounting builds
• Six position buffer tube designed to fit mil spec collapsible buttstocks
• Precision machined aircraft grade aluminum construction supports durable performance
• Black hard anodized finish provides corrosion resistance and consistent appearance
• NcSTAR VG137 buffer tube part supports AR rifles requiring mil spec receiver extension
• Matte finish mil spec buffer tube series includes castle nut for installation

The NcSTAR Buffer Tube and Castle Nut is a buffer tube kit designed for AR-15 rifle stock installation. This AR buffer tube assembly provides a Mil-Spec 6 position interface for collapsible buttstocks and defines the receiver extension used on AR platforms.

This NcSTAR Buffer Tube and Castle Nut features aircraft grade aluminum construction with a black hard anodized finish and includes a castle nut for installation. The Mil-Spec size receiver extension fits AR rifles that use standard Mil-Spec components and supports 6 position adjustment for length of pull. This model is categorized as a recoil system component and is used for rifle builds, upgrades, or replacement of worn buffer tube assemblies. The matte finish reduces glare in normal operation, and the threaded interface attaches to compatible lower receivers. This product is used for AR stock mounting and buffer system alignment in standard configurations.