Spikes Tactical SLA500R 6-Position Mil-Spec Buffer Tube - Black Hardcoat Anodized Aluminum

The Spike's Tactical SLA500R is a mil-spec buffer tube built for AR-pattern carbine builds that demand solid, no-nonsense performance. At 7.25 inches long, this black hardcoat anodized aluminum tube provides the standard diameter and threading your AR lower receiver expects, making it a drop-in replacement or core component for any carbine-length build. Whether you're assembling an upper from scratch, upgrading an existing rifle, or swapping in a new stock, this tube gives you a proven foundation—the kind of part that works quietly in the background and doesn't let you down.

What sets this buffer tube apart is its thoughtful design for shooters who know what they want. The laser-engraved position markers make adjusting your stock fast and repeatable, and the 6-position adjustability lets you dial in length of pull for different shooting scenarios, gear configurations, or simply getting the fit right for your frame. The hardcoat anodize finish resists wear and corrosion, keeping your rifle looking and functioning right whether you're running it hard at the range or in the field.

This is the tube itself—no stock or spring included. If you already have a carbine stock you prefer, or you want to hand-pick your buffer assembly components, the SLA500R gives you that flexibility. It's mil-spec, it's proven, and it's a staple in serious AR builds for a reason.

Key Features

• Mil-spec diameter and threading for standard AR-pattern lowers
• 7.25-inch length for carbine-configured builds
• 6-position adjustability for customized length of pull
• Laser-engraved position markers for quick, repeatable adjustments
• Black hardcoat anodized aluminum finish for durability and corrosion resistance

Specifications

Frequently Asked Questions

Is this buffer tube compatible with my AR-15 lower receiver?

The SLA500R is mil-spec diameter, so it will fit any standard AR-pattern lower receiver designed for carbine buffer tubes. It's a direct fit for any mil-spec build.

Will I need to buy a stock and buffer separately?

Yes. This product is the tube only. You'll need to source a compatible carbine stock and acquire a buffer, buffer spring, and end plate separately—or use components you already have on hand.

What does the 6-position adjustability do?

The 6-position design lets you adjust the length of pull of your stock. This is useful for dialing in comfort with different gear loadouts, accommodating different shooters, or finding your preferred feel. The laser-engraved markers help you return to the same position each time.

Is the black finish durable?

The hardcoat anodized finish is a mil-spec standard that resists corrosion and everyday wear. It's a tough, long-lasting coating typical of quality AR components.