Phase 5 AR Pistol Buffer Tube Assembly, Black Aluminum

The Phase 5 Weapon Systems AR Pistol Buffer Tube Assembly in black aluminum (brand part number PBT-CA) gives an AR pistol build a complete, ready-to-install buffer package designed around SB Tactical stabilizing braces. The billet aluminum tube pairs with an ultra-durable nitrile rubber foam pad, a Mil-Spec end plate, and a castle nut, and it’s compatible with standard mil-spec carbine buffers and springs. The lower slot accepts all mil-spec end plates and sling mounting accessories, and the tube gives a snug fit that prevents unwanted brace movement while allowing any desired brace position along its length. It’s compatible with SB Tactical braces that accept round tubes, but not adjustable braces like the SBA3, SBA4, or PDW. The kit includes the pistol buffer tube, castle nut, end plate, foam pad, carbine buffer, and a Phase 5 enhanced buffer spring.

Key Specifications

• Built for the AR pistol platform.
• Black billet aluminum construction.
• Compatible with SB Tactical braces that accept round tubes (not SBA3/SBA4/PDW).
• Ultra-Durable Nitrile Rubber Foam Pad for a comfortable, snug brace fit.
• Includes a Mil-Spec End Plate and Castle Nut.
• Complete with a Carbine Buffer and Phase 5 Enhanced Buffer Spring.

Frequently Asked Questions

What does the kit include? The pistol buffer tube, castle nut, end plate, foam pad, carbine buffer, and Phase 5 enhanced buffer spring.

What braces is this compatible with? SB Tactical braces that accept round tubes; not adjustable braces like the SBA3, SBA4, or PDW.

Does the brace move around on the tube? No, the foam pad gives a snug fit that prevents unwanted movement while still allowing any position along the tube.

Buy the Phase 5 AR Pistol Buffer Tube Assembly, Black Aluminum

Finish your pistol build with a Phase 5 assembly from our AR buffer systems selection. Order online and we’ll ship it straight to your door from our Lubbock, Texas gun shop.