AR-15 Pistol Buffer Tube

AR-15 Pistol Buffer Tube (PBT)

*Please select desired color before adding product to cart*

Black/ Red/ Grey Blue

Complete Assembly for color options:

Add a PBT (any color), PBS and a Standard Carbine Buffer to your cart and receive the Complete Assembly price (discount automatically applied in cart)

AR-15 Pistol Buffer Tube (PBT)™ by Phase 5 Weapon Systems Inc features our billet aluminum buffer tube, foam pad constructed of ultra-durable nitrile rubber, plus Mil-Spec end plate and castle nut. Buffer tube is compatible with Mil-Spec carbine buffer and spring, and the lower slot is machined to accept all Mil-Spec end plates and sling mounting accessories.

Overall diameter: 1.25”

Works great with the Sig Sauer® Pistol Stabilizing Brace! Nice snug fit to insure no unwanted brace movement during pistol operation. Also allowing any desired brace position with zero restrictions, all the way forward, or as far back on the tube as you would like.

Pat No.: US D717, 906 S


    • Pistol Buffer Tube (PBT)
    • Castle Nut
    • End Plate
    • Foam Pad

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In stock
Item Price: $49.95

Code: PBT

7.4 inches
CNC-machined aluminum Pistol buffer tube


CNC-machined 7075 T651 certified US made billet aluminum Pistol buffer tube

Tube is designed to fit Mil-Spec carbine buffer and spring.

Red Pistol Buffer Tube


grey Pistol Buffer Tube

Hard-anodized Mil-Spec type III black finish

Finish adds durability and visual appeal that ensures reliability against component wear.


Machined lower slot

Slot offers maximum compatibility by accepting all Mil-Spec end plates and sling mounting accessories.

grey Pistol Buffer Tube