Description

Furnish your AR-15 with a reliable, high-quality receiver extension using the Aim Arms Mil-Spec Complete Buffer Tube Kit — a complete package built for durability, compatibility, and smooth operation.

Durable 6061-T6 Aluminum Construction

The carbine 6-position mil-spec buffer tube is precision machined from 6061-T6 aluminum for exceptional strength and long service life. The tube is fully finished inside and out and highly anodized with a polished bore to reduce friction and improve cycling reliability under heavy use.

Universal Mil-Spec Compatibility

Designed to accept all mil-spec carbine stocks, this receiver extension provides a hassle-free fit with a wide range of buffer-stock combinations. Whether you’re building a new rifle or upgrading an existing one, the Aim Arms kit integrates cleanly with standard mil-spec components.

Complete Mounting Kit

This kit contains everything needed to install a proper mil-spec carbine setup:

• 6-position mil-spec carbine diameter receiver extension (buffer tube)

• Full 3 oz carbine buffer

• Heavy-duty carbine buffer spring

• Castle nut (receiver nut)

• Mil-spec receiver end plate

Each component is selected to work together for consistent, reliable performance.

Build with Confidence

Whether you’re a seasoned builder or assembling your first AR-15, the Aim Arms Mil-Spec Complete Buffer Tube Kit delivers the strength and compatibility you need to build or upgrade with confidence. Rugged construction, polished/anodized finish, and a full parts package make this kit a smart choice for durable, mil-spec carbine applications.