Strike Industries 7-Position Advanced Receiver Extension Buffer Tube Mil-Spec for AR-15/LR-308 Carbine Aluminum

The Strike Industries 7-Position Advanced Receiver Extension Buffer Tube is a mil-spec aluminum upgrade for AR-15 and LR-308 platforms that addresses a component often overlooked in build quality. This isn't just a generic buffer tube—it's engineered to improve both handling and durability in ways that matter during actual shooting and maintenance. Whether you're building a carbine for the range, competition, or field work, a quality receiver extension that seats properly and cycles smoothly makes a real difference.

Strike Industries machined this tube from 7075-T6 aluminum, a higher-strength alloy than the standard 6061 found on budget options. The scalloped surfaces reduce friction with snug-fitting stocks, which means easier installation and removal without marring your components—plus it saves weight where it doesn't hurt. The supported buffer retaining tab does double duty: it keeps your buffer spring captive and provides an indexing feature that makes reassembly more intuitive and repeatable.

If you're running a tight-tolerance stock or just tired of wrestling with a loose, rattly tube, this upgrade pays dividends in fit, feel, and longevity. The 7-position design gives you adjustment flexibility for different shooting positions or loadouts, and the mil-spec dimensions ensure compatibility with standard AR components.

Key Features

• 7075-T6 aluminum construction for superior strength and durability
• Scalloped surfaces reduce friction and weight without sacrificing structural integrity
• Supported buffer retaining tab prevents spring loss and aids proper indexing
• Mil-spec compatible with AR-15 and LR-308 carbine platforms
• 7-position adjustment for flexibility in stock setup and configuration

Specifications

Frequently Asked Questions

Will this buffer tube fit my AR-15 build?

Yes. The Strike Industries Advanced Receiver Extension is mil-spec and compatible with both AR-15 and LR-308 carbine platforms, so it works with standard receivers and stocks designed for those systems.

What's the advantage of 7075-T6 aluminum over standard buffer tubes?

7075-T6 is a higher-strength aluminum alloy than the 6061 typically used in budget tubes, giving you greater durability and longevity under repeated cycling and stress. It's the same material choice used in quality AR components across the board.

Why does the scalloped design matter?

The scalloped surfaces reduce friction, which makes the tube easier to install and remove when you're swapping stocks or doing maintenance. It also shaves weight without removing material from high-stress areas, keeping the tube strong where it counts.

What does the buffer retaining tab do?

The supported buffer retaining tab prevents your buffer spring from sliding off during disassembly and also serves as an indexing feature to help you seat the tube correctly and repeatably every time you reassemble.