AR-15 Pistol Buffer Tube

AR-15 Pistol Buffer Tube (PBT)

Black/ Red/ Grey / Blue

Product Description:

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. Works great with the SB Tactical Pistol Stabilizing Braces*! 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.

*Compatible with SB Tactical Braces that accept round tubes. Not compatible with adjustable braces (ie: SBA3, SBA4, PDW)

Outside diameter: 1.25”

Pat No.: US D717, 906 S


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

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Prop 65 Warning

Item Price: $39.95
Overall Length:
7.4 inches
Product Weight:
Assembled Weight:
Made in the U.S.A.
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