Phase 5 PBT-CA Pistol Buffer Tube Assembly

Phase 5 Pistol Buffer Tube Assembly

The Phase 5 PBT-CA is a complete, ready-to-install buffer tube assembly purpose-built for AR pistol platforms. This is a no-compromise component that handles the demanding requirements of pistol-configured AR-15s.

What's Included

• Billet aluminum pistol buffer tube
• Enhanced buffer spring
• Mil-Spec carbine buffer
• Mil-Spec end plate
• Mil-Spec castle nut
• Ultra-durable nitrile rubber foam pad

Key Features

Precision Engineering: The billet aluminum tube is machined to accept all Mil-Spec end plates and sling mounting accessories, giving you flexibility in your setup.

Brace Compatibility: Works with most round-tube pistol stabilizing braces, offering a snug fit that prevents unwanted movement during operation. The design allows full positioning freedom—mount your brace all the way forward or as far back as needed.

Mil-Spec Construction: Every component meets military specifications, ensuring reliability and durability in the field or at the range.

Important Compatibility Note: This assembly is compatible with round-tube braces only. It is not compatible with adjustable braces such as the SBA3, SBA4, or PDW-style braces.

The Bottom Line

If you're building or upgrading an AR pistol, the Phase 5 PBT-CA eliminates guesswork. It's a complete solution from a manufacturer known for quality and attention to detail.